diff --git a/Icarus/ControllerInputPanel/ControllerInputPanelV.xaml b/Icarus/ControllerInputPanel/ControllerInputPanelV.xaml
index df3756a..b0e1e1a 100644
--- a/Icarus/ControllerInputPanel/ControllerInputPanelV.xaml
+++ b/Icarus/ControllerInputPanel/ControllerInputPanelV.xaml
@@ -3,7 +3,7 @@
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:EgtWPFLib5="clr-namespace:EgtWPFLib5;assembly=EgtWPFLib5"
         Height="38"
-        Visibility="{Binding DoneBtn_Visibility}"
+        Visibility="{Binding Message_Visibility}"
         HorizontalAlignment="Left"
         Margin="45,0,0,0"
         Padding="0"
diff --git a/Icarus/FilledSolidPanel/FilledSolidPanelVM.vb b/Icarus/FilledSolidPanel/FilledSolidPanelVM.vb
index e05d83c..451b62d 100644
--- a/Icarus/FilledSolidPanel/FilledSolidPanelVM.vb
+++ b/Icarus/FilledSolidPanel/FilledSolidPanelVM.vb
@@ -213,7 +213,7 @@ Public Class FilledSolidPanelVM
          Return m_bAdd_IsChecked
       End Get
       Set(value As Boolean)
-         If Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 Then
+         If Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 AndAlso Not m_bCPlaneObj_IsActive Then
             m_bAdd_IsChecked = value
             If value Then
                m_bEdit_IsChecked = False
@@ -235,7 +235,7 @@ Public Class FilledSolidPanelVM
          Return m_bEdit_IsChecked
       End Get
       Set(value As Boolean)
-         If Not IsNothing(m_SelFilledSolid) AndAlso Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 Then
+         If Not IsNothing(m_SelFilledSolid) AndAlso Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 AndAlso Not m_bCPlaneObj_IsActive Then
             m_bEdit_IsChecked = value
             If value Then
                m_bAdd_IsChecked = False
@@ -259,7 +259,7 @@ Public Class FilledSolidPanelVM
          Return m_bGrid_IsChecked
       End Get
       Set(value As Boolean)
-         If Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 Then
+         If Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 AndAlso Not m_bCPlaneObj_IsActive Then
             m_bGrid_IsChecked = value
             If value Then
                m_bAdd_IsChecked = False
@@ -287,7 +287,7 @@ Public Class FilledSolidPanelVM
          Return m_bMove_IsChecked
       End Get
       Set(value As Boolean)
-         If Not IsNothing(m_SelFilledSolid) AndAlso Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 Then
+         If Not IsNothing(m_SelFilledSolid) AndAlso Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 AndAlso Not m_bCPlaneObj_IsActive Then
             m_bMove_IsChecked = value
             If value Then
                m_bAdd_IsChecked = False
@@ -311,7 +311,7 @@ Public Class FilledSolidPanelVM
          Return m_bRotate_IsChecked
       End Get
       Set(value As Boolean)
-         If Not IsNothing(m_SelFilledSolid) AndAlso Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 Then
+         If Not IsNothing(m_SelFilledSolid) AndAlso Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 AndAlso Not m_bCPlaneObj_IsActive Then
             m_bRotate_IsChecked = value
             If value Then
                m_bAdd_IsChecked = False
@@ -335,7 +335,7 @@ Public Class FilledSolidPanelVM
          Return m_bMachParam_IsChecked
       End Get
       Set(value As Boolean)
-         If Not IsNothing(m_SelFilledSolid) AndAlso Map.refSceneHostVM.MainController.GetStep = 0 AndAlso Not IsNothing(Map.refTopPanelVM.SelMachining) AndAlso value Then
+         If Not IsNothing(m_SelFilledSolid) AndAlso Map.refSceneHostVM.MainController.GetStep = 0 AndAlso Not m_bCPlaneObj_IsActive AndAlso Not IsNothing(Map.refTopPanelVM.SelMachining) AndAlso value Then
             m_bMachParam_IsChecked = True
             m_bAdd_IsChecked = False
             m_bEdit_IsChecked = False
@@ -517,7 +517,6 @@ Public Class FilledSolidPanelVM
    Private m_cmdCPlaneObj As ICommand
    Private m_cmdDragMove As ICommand
    Private m_cmdDragRotate As ICommand
-   Private m_cmdMachParam As ICommand
 
 #End Region    ' FIELDS & PROPERTIES
 
@@ -718,9 +717,15 @@ Public Class FilledSolidPanelVM
             ' lo seleziono
             SelFilledSolid = NewEntity
             NotifyPropertyChanged(NameOf(SelFilledSolid))
-            ' creo layer per estrusione
-            Dim nNewExtrusionLayerId As Integer = EgtCreateGroup(m_nPartId)
-            EgtSetName(nNewExtrusionLayerId, LAY_NEWEXTRUSION)
+            ' verifico se esiste gia' layer estrusione e lo svuoto
+            Dim nNewExtrusionLayerId As Integer = EgtGetFirstNameInGroup(m_nPartId, LAY_NEWEXTRUSION)
+            If nNewExtrusionLayerId <> GDB_ID.NULL Then
+               EgtEmptyGroup(nNewExtrusionLayerId)
+            Else
+               ' altrimenti lo creo
+               nNewExtrusionLayerId = EgtCreateGroup(m_nPartId)
+               EgtSetName(nNewExtrusionLayerId, LAY_NEWEXTRUSION)
+            End If
             EgtSetCurrPartLayer(m_nPartId, nNewExtrusionLayerId)
             ' seleziono percorso da estrudere
             EgtDeselectAll()
@@ -809,7 +814,7 @@ Public Class FilledSolidPanelVM
    ''' Execute the CPlaneTop.  This method is invoked by the CPlaneTopCommand.
    ''' </summary>
    Public Sub Import(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.InsertFilledSolid()
    End Sub
 
@@ -833,7 +838,7 @@ Public Class FilledSolidPanelVM
    ''' Execute the CPlaneTop.  This method is invoked by the CPlaneTopCommand.
    ''' </summary>
    Public Sub Line2P(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Dim nNewShellNumberLayerId As Integer = EgtGetFirstNameInGroup(m_nPartId, LAY_NEWRIB)
       If nNewShellNumberLayerId = GDB_ID.NULL Then nNewShellNumberLayerId = EgtCreateGroup(m_nPartId)
       EgtSetName(nNewShellNumberLayerId, LAY_NEWRIB)
@@ -858,7 +863,7 @@ Public Class FilledSolidPanelVM
    End Property
 
    Public Sub Delete()
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       If IsNothing(SelFilledSolid) Then Return
       Dim bOk As Boolean = False
       Select Case m_SelFilledSolid.Type
@@ -904,7 +909,7 @@ Public Class FilledSolidPanelVM
    ''' Execute the LinearDimension.  This method is invoked by the LinDimCommand.
    ''' </summary>
    Public Sub ModifyCurve(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       InitCommand(FilledSolidSelectionTypes.CURVE)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.MODIFYCURVE)
    End Sub
@@ -929,7 +934,7 @@ Public Class FilledSolidPanelVM
    ''' Execute the LinearDimension.  This method is invoked by the LinDimCommand.
    ''' </summary>
    Public Sub AddPointCurve(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       InitCommand(FilledSolidSelectionTypes.CURVE)
       If (Keyboard.Modifiers And ModifierKeys.Shift) = ModifierKeys.Shift Then
          Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.CURVETOARC)
@@ -958,7 +963,7 @@ Public Class FilledSolidPanelVM
    ''' Execute the LinearDimension.  This method is invoked by the LinDimCommand.
    ''' </summary>
    Public Sub RemovePointCurve(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       InitCommand(FilledSolidSelectionTypes.CURVE)
       If (Keyboard.Modifiers And ModifierKeys.Shift) = ModifierKeys.Shift Then
          Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.CURVETOLINE)
@@ -987,7 +992,7 @@ Public Class FilledSolidPanelVM
    ''' Execute the Extrude.  This method is invoked by the ExtrudeCommand.
    ''' </summary>
    Public Sub Extrude(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       InitCommand(FilledSolidSelectionTypes.EXTRUSION)
       If Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.EXTRUDE) Then
          m_bIsCreatingExtrusion = True
@@ -1015,7 +1020,7 @@ Public Class FilledSolidPanelVM
    ''' Execute the CPlaneTop.  This method is invoked by the CPlaneTopCommand.
    ''' </summary>
    Public Sub CPlaneTop(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.SetLastInteger(Controller.GRID_TYPE.TOP)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID)
    End Sub
@@ -1040,7 +1045,7 @@ Public Class FilledSolidPanelVM
    ''' Execute the CPlaneFront.  This method is invoked by the CPlaneFrontCommand.
    ''' </summary>
    Public Sub CPlaneFront(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.SetLastInteger(Controller.GRID_TYPE.FRONT)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID)
    End Sub
@@ -1065,7 +1070,7 @@ Public Class FilledSolidPanelVM
    ''' Execute the CPlaneRight.  This method is invoked by the CPlaneRightCommand.
    ''' </summary>
    Public Sub CPlaneRight(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.SetLastInteger(Controller.GRID_TYPE.RIGHT)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID)
    End Sub
@@ -1090,7 +1095,7 @@ Public Class FilledSolidPanelVM
    ''' Execute the CPlaneBack.  This method is invoked by the CPlaneBackCommand.
    ''' </summary>
    Public Sub CPlaneBack(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.SetLastInteger(Controller.GRID_TYPE.BACK)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID)
    End Sub
@@ -1115,7 +1120,7 @@ Public Class FilledSolidPanelVM
    ''' Execute the CPlaneLeft.  This method is invoked by the CPlaneLeftCommand.
    ''' </summary>
    Public Sub CPlaneLeft(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.SetLastInteger(Controller.GRID_TYPE.LEFT)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID)
    End Sub
@@ -1140,7 +1145,7 @@ Public Class FilledSolidPanelVM
    ''' Execute the CPlaneBottom.  This method is invoked by the CPlaneBottomCommand.
    ''' </summary>
    Public Sub CPlaneBottom(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.SetLastInteger(Controller.GRID_TYPE.BOTTOM)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID)
    End Sub
@@ -1165,7 +1170,7 @@ Public Class FilledSolidPanelVM
    ''' Execute the CPlaneElevation.  This method is invoked by the CPlaneElevationCommand.
    ''' </summary>
    Public Sub CPlaneElevation(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID_ELEVATION)
    End Sub
 
@@ -1189,7 +1194,7 @@ Public Class FilledSolidPanelVM
    ''' Execute the CPlaneOrigin.  This method is invoked by the CPlaneOriginCommand.
    ''' </summary>
    Public Sub CPlaneOrigin(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID_ORIGIN)
    End Sub
 
@@ -1213,7 +1218,7 @@ Public Class FilledSolidPanelVM
    ''' Execute the CPlaneRotate.  This method is invoked by the CPlaneRotateCommand.
    ''' </summary>
    Public Sub CPlaneRotate(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       If (Keyboard.Modifiers And ModifierKeys.Shift) <> ModifierKeys.Shift Then
          Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID_ROTATE)
       Else
@@ -1241,7 +1246,7 @@ Public Class FilledSolidPanelVM
    ''' Execute the CPlane3P.  This method is invoked by the CPlane3PCommand.
    ''' </summary>
    Public Sub CPlane3P(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID_3P)
    End Sub
 
@@ -1265,7 +1270,7 @@ Public Class FilledSolidPanelVM
    ''' Execute the CPlanePerpObj.  This method is invoked by the CPlanePerpObjCommand.
    ''' </summary>
    Public Sub CPlanePerpObj(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID_PERPCURVE)
    End Sub
 
@@ -1305,7 +1310,7 @@ Public Class FilledSolidPanelVM
    ''' Execute the CPlaneObj.  This method is invoked by the CPlaneObjCommand.
    ''' </summary>
    Public Sub CPlaneObj(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       ' salvo selezione precedente e deseleziono altri oggetti
       m_PrevSelObjs.Clear()
       Dim nSelObjId As Integer = EgtGetFirstSelectedObj()
@@ -1315,7 +1320,7 @@ Public Class FilledSolidPanelVM
       End While
       EgtDeselectAll()
       m_bCPlaneObj_IsActive = True
-      '  Map.refControllerInputPanelVM.PrepareInputBox("Grid from Selection", "Select the face of the object where to place the grid", "", False, False)
+      Map.refControllerInputPanelVM.ShowMessage("Grid from Selection", "Select the face of the object where to place the grid")
    End Sub
 
 #End Region ' CPlaneObj
@@ -1332,7 +1337,7 @@ Public Class FilledSolidPanelVM
    End Property
 
    Public Sub DragMove()
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       InitCommand(FilledSolidSelectionTypes.BOTH)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.MOVE)
    End Sub
@@ -1351,41 +1356,13 @@ Public Class FilledSolidPanelVM
    End Property
 
    Public Sub DragRotate()
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       InitCommand(FilledSolidSelectionTypes.BOTH)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.ROTATE)
    End Sub
 
 #End Region    ' DragRotate
 
-#Region "MachParam"
-
-   Public ReadOnly Property MachParam_Command As ICommand
-      Get
-         If m_cmdMachParam Is Nothing Then
-            m_cmdMachParam = New Command(AddressOf MachParam)
-         End If
-         Return m_cmdMachParam
-      End Get
-   End Property
-
-   Public Sub MachParam()
-      If IsNothing(Map.refTopPanelVM.SelMachining) Then Return
-      m_bAdd_IsChecked = False
-      m_bEdit_IsChecked = False
-      m_bGrid_IsChecked = False
-      m_bMove_IsChecked = False
-      m_bRotate_IsChecked = False
-      NotifyPropertyChanged(NameOf(bAdd_IsChecked))
-      NotifyPropertyChanged(NameOf(bEdit_IsChecked))
-      NotifyPropertyChanged(NameOf(bGrid_IsChecked))
-      NotifyPropertyChanged(NameOf(bMove_IsChecked))
-      NotifyPropertyChanged(NameOf(bRotate_IsChecked))
-      Map.refRightPanelVM.SetSelPanel(RightPanelVM.Panels.AUXSOLIDPARAM)
-   End Sub
-
-#End Region    ' MachParam
-
 #End Region    ' COMMANDS
 
 End Class
diff --git a/Icarus/RibPanel/RibPanelVM.vb b/Icarus/RibPanel/RibPanelVM.vb
index 5f85e49..11875a4 100644
--- a/Icarus/RibPanel/RibPanelVM.vb
+++ b/Icarus/RibPanel/RibPanelVM.vb
@@ -238,7 +238,7 @@ Public Class RibPanelVM
          Return m_bAdd_IsChecked
       End Get
       Set(value As Boolean)
-         If Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 Then
+         If Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 AndAlso Not m_bCPlaneObj_IsActive Then
             m_bAdd_IsChecked = value
             If value Then
                m_bEdit_IsChecked = False
@@ -260,7 +260,7 @@ Public Class RibPanelVM
          Return m_bEdit_IsChecked
       End Get
       Set(value As Boolean)
-         If Not IsNothing(m_SelRib) AndAlso Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 Then
+         If Not IsNothing(m_SelRib) AndAlso Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 AndAlso Not m_bCPlaneObj_IsActive Then
             m_bEdit_IsChecked = value
             If value Then
                m_bAdd_IsChecked = False
@@ -284,7 +284,7 @@ Public Class RibPanelVM
          Return m_bGrid_IsChecked
       End Get
       Set(value As Boolean)
-         If Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 Then
+         If Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 AndAlso Not m_bCPlaneObj_IsActive Then
             m_bGrid_IsChecked = value
             If value Then
                m_bAdd_IsChecked = False
@@ -312,7 +312,7 @@ Public Class RibPanelVM
          Return m_bMove_IsChecked
       End Get
       Set(value As Boolean)
-         If Not IsNothing(m_SelRib) AndAlso Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 Then
+         If Not IsNothing(m_SelRib) AndAlso Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 AndAlso Not m_bCPlaneObj_IsActive Then
             m_bMove_IsChecked = value
             If value Then
                m_bAdd_IsChecked = False
@@ -336,7 +336,7 @@ Public Class RibPanelVM
          Return m_bRotate_IsChecked
       End Get
       Set(value As Boolean)
-         If Not IsNothing(m_SelRib) AndAlso Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 Then
+         If Not IsNothing(m_SelRib) AndAlso Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 AndAlso Not m_bCPlaneObj_IsActive Then
             m_bRotate_IsChecked = value
             If value Then
                m_bAdd_IsChecked = False
@@ -360,7 +360,7 @@ Public Class RibPanelVM
          Return m_bMachParam_IsChecked
       End Get
       Set(value As Boolean)
-         If Not IsNothing(m_SelRib) AndAlso Map.refSceneHostVM.MainController.GetStep = 0 AndAlso Not IsNothing(Map.refTopPanelVM.SelMachining) AndAlso value Then
+         If Not IsNothing(m_SelRib) AndAlso Map.refSceneHostVM.MainController.GetStep = 0 AndAlso Not m_bCPlaneObj_IsActive AndAlso Not IsNothing(Map.refTopPanelVM.SelMachining) AndAlso value Then
             m_bMachParam_IsChecked = True
             m_bAdd_IsChecked = False
             m_bEdit_IsChecked = False
@@ -542,7 +542,6 @@ Public Class RibPanelVM
    Private m_cmdCPlaneObj As ICommand
    Private m_cmdDragMove As ICommand
    Private m_cmdDragRotate As ICommand
-   Private m_cmdMachParam As ICommand
 
 #End Region    ' FIELDS & PROPERTIES
 
@@ -740,9 +739,15 @@ Public Class RibPanelVM
             ' lo seleziono
             SelRib = NewEntity
             NotifyPropertyChanged(NameOf(SelRib))
-            ' creo layer per estrusione
-            Dim nNewExtrusionLayerId As Integer = EgtCreateGroup(m_nPartId)
-            EgtSetName(nNewExtrusionLayerId, LAY_NEWEXTRUSION)
+            ' verifico se esiste gia' layer estrusione e lo svuoto
+            Dim nNewExtrusionLayerId As Integer = EgtGetFirstNameInGroup(m_nPartId, LAY_NEWEXTRUSION)
+            If nNewExtrusionLayerId <> GDB_ID.NULL Then
+               EgtEmptyGroup(nNewExtrusionLayerId)
+            Else
+               ' altrimenti lo creo
+               nNewExtrusionLayerId = EgtCreateGroup(m_nPartId)
+               EgtSetName(nNewExtrusionLayerId, LAY_NEWEXTRUSION)
+            End If
             EgtSetCurrPartLayer(m_nPartId, nNewExtrusionLayerId)
             ' seleziono percorso da estrudere
             EgtDeselectAll()
@@ -831,7 +836,7 @@ Public Class RibPanelVM
    ''' Execute the CPlaneTop.  This method is invoked by the CPlaneTopCommand.
    ''' </summary>
    Public Sub Import(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.InsertRib()
    End Sub
 
@@ -855,7 +860,7 @@ Public Class RibPanelVM
    ''' Execute the CPlaneTop.  This method is invoked by the CPlaneTopCommand.
    ''' </summary>
    Public Sub Line2P(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Dim nNewRibLayerId As Integer = EgtGetFirstNameInGroup(m_nPartId, LAY_NEWRIB)
       If nNewRibLayerId = GDB_ID.NULL Then nNewRibLayerId = EgtCreateGroup(m_nPartId)
       EgtSetName(nNewRibLayerId, LAY_NEWRIB)
@@ -880,7 +885,7 @@ Public Class RibPanelVM
    End Property
 
    Public Sub Delete()
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       If IsNothing(SelRib) Then Return
       Dim bOk As Boolean = False
       Select Case m_SelRib.Type
@@ -926,7 +931,7 @@ Public Class RibPanelVM
    ''' Execute the LinearDimension.  This method is invoked by the LinDimCommand.
    ''' </summary>
    Public Sub ModifyCurve(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       InitCommand(RibSelectionTypes.CURVE)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.MODIFYCURVE)
    End Sub
@@ -951,7 +956,7 @@ Public Class RibPanelVM
    ''' Execute the LinearDimension.  This method is invoked by the LinDimCommand.
    ''' </summary>
    Public Sub AddPointCurve(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       InitCommand(RibSelectionTypes.CURVE)
       If (Keyboard.Modifiers And ModifierKeys.Shift) = ModifierKeys.Shift Then
          Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.CURVETOARC)
@@ -980,7 +985,7 @@ Public Class RibPanelVM
    ''' Execute the LinearDimension.  This method is invoked by the LinDimCommand.
    ''' </summary>
    Public Sub RemovePointCurve(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       InitCommand(RibSelectionTypes.CURVE)
       If (Keyboard.Modifiers And ModifierKeys.Shift) = ModifierKeys.Shift Then
          Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.CURVETOLINE)
@@ -1009,7 +1014,7 @@ Public Class RibPanelVM
    ''' Execute the Extrude.  This method is invoked by the ExtrudeCommand.
    ''' </summary>
    Public Sub Extrude(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       InitCommand(RibSelectionTypes.EXTRUSION)
       If Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.EXTRUDE) Then
          m_bIsCreatingExtrusion = True
@@ -1036,7 +1041,7 @@ Public Class RibPanelVM
    ''' Execute the CPlaneTop.  This method is invoked by the CPlaneTopCommand.
    ''' </summary>
    Public Sub CPlaneTop(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.SetLastInteger(Controller.GRID_TYPE.TOP)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID)
    End Sub
@@ -1061,7 +1066,7 @@ Public Class RibPanelVM
    ''' Execute the CPlaneFront.  This method is invoked by the CPlaneFrontCommand.
    ''' </summary>
    Public Sub CPlaneFront(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.SetLastInteger(Controller.GRID_TYPE.FRONT)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID)
    End Sub
@@ -1086,7 +1091,7 @@ Public Class RibPanelVM
    ''' Execute the CPlaneRight.  This method is invoked by the CPlaneRightCommand.
    ''' </summary>
    Public Sub CPlaneRight(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.SetLastInteger(Controller.GRID_TYPE.RIGHT)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID)
    End Sub
@@ -1111,7 +1116,7 @@ Public Class RibPanelVM
    ''' Execute the CPlaneBack.  This method is invoked by the CPlaneBackCommand.
    ''' </summary>
    Public Sub CPlaneBack(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.SetLastInteger(Controller.GRID_TYPE.BACK)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID)
    End Sub
@@ -1136,7 +1141,7 @@ Public Class RibPanelVM
    ''' Execute the CPlaneLeft.  This method is invoked by the CPlaneLeftCommand.
    ''' </summary>
    Public Sub CPlaneLeft(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.SetLastInteger(Controller.GRID_TYPE.LEFT)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID)
    End Sub
@@ -1161,7 +1166,7 @@ Public Class RibPanelVM
    ''' Execute the CPlaneBottom.  This method is invoked by the CPlaneBottomCommand.
    ''' </summary>
    Public Sub CPlaneBottom(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.SetLastInteger(Controller.GRID_TYPE.BOTTOM)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID)
    End Sub
@@ -1186,7 +1191,7 @@ Public Class RibPanelVM
    ''' Execute the CPlaneElevation.  This method is invoked by the CPlaneElevationCommand.
    ''' </summary>
    Public Sub CPlaneElevation(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID_ELEVATION)
    End Sub
 
@@ -1210,7 +1215,7 @@ Public Class RibPanelVM
    ''' Execute the CPlaneOrigin.  This method is invoked by the CPlaneOriginCommand.
    ''' </summary>
    Public Sub CPlaneOrigin(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID_ORIGIN)
    End Sub
 
@@ -1234,7 +1239,7 @@ Public Class RibPanelVM
    ''' Execute the CPlaneRotate.  This method is invoked by the CPlaneRotateCommand.
    ''' </summary>
    Public Sub CPlaneRotate(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       If (Keyboard.Modifiers And ModifierKeys.Shift) <> ModifierKeys.Shift Then
          Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID_ROTATE)
       Else
@@ -1262,7 +1267,7 @@ Public Class RibPanelVM
    ''' Execute the CPlane3P.  This method is invoked by the CPlane3PCommand.
    ''' </summary>
    Public Sub CPlane3P(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID_3P)
    End Sub
 
@@ -1286,7 +1291,7 @@ Public Class RibPanelVM
    ''' Execute the CPlanePerpObj.  This method is invoked by the CPlanePerpObjCommand.
    ''' </summary>
    Public Sub CPlanePerpObj(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID_PERPCURVE)
    End Sub
 
@@ -1326,7 +1331,7 @@ Public Class RibPanelVM
    ''' Execute the CPlaneObj.  This method is invoked by the CPlaneObjCommand.
    ''' </summary>
    Public Sub CPlaneObj(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       ' salvo selezione precedente e deseleziono altri oggetti
       m_PrevSelObjs.Clear()
       Dim nSelObjId As Integer = EgtGetFirstSelectedObj()
@@ -1336,7 +1341,7 @@ Public Class RibPanelVM
       End While
       EgtDeselectAll()
       m_bCPlaneObj_IsActive = True
-      '  Map.refControllerInputPanelVM.PrepareInputBox("Grid from Selection", "Select the face of the object where to place the grid", "", False, False)
+      Map.refControllerInputPanelVM.ShowMessage("Grid from Selection", "Select the face of the object where to place the grid")
    End Sub
 
 #End Region ' CPlaneObj
@@ -1353,6 +1358,7 @@ Public Class RibPanelVM
    End Property
 
    Public Sub DragMove()
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       InitCommand(RibSelectionTypes.BOTH)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.MOVE)
    End Sub
@@ -1371,40 +1377,13 @@ Public Class RibPanelVM
    End Property
 
    Public Sub DragRotate()
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       InitCommand(RibSelectionTypes.BOTH)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.ROTATE)
    End Sub
 
 #End Region    ' DragRotate
 
-#Region "MachParam"
-
-   Public ReadOnly Property MachParam_Command As ICommand
-      Get
-         If m_cmdMachParam Is Nothing Then
-            m_cmdMachParam = New Command(AddressOf MachParam)
-         End If
-         Return m_cmdMachParam
-      End Get
-   End Property
-
-   Public Sub MachParam()
-      If IsNothing(Map.refTopPanelVM.SelMachining) Then Return
-      m_bAdd_IsChecked = False
-      m_bEdit_IsChecked = False
-      m_bGrid_IsChecked = False
-      m_bMove_IsChecked = False
-      m_bRotate_IsChecked = False
-      NotifyPropertyChanged(NameOf(bAdd_IsChecked))
-      NotifyPropertyChanged(NameOf(bEdit_IsChecked))
-      NotifyPropertyChanged(NameOf(bGrid_IsChecked))
-      NotifyPropertyChanged(NameOf(bMove_IsChecked))
-      NotifyPropertyChanged(NameOf(bRotate_IsChecked))
-      Map.refRightPanelVM.SetSelPanel(RightPanelVM.Panels.RIBPARAM)
-   End Sub
-
-#End Region    ' MachParam
-
 #End Region    ' COMMANDS
 
 End Class
diff --git a/Icarus/SceneHost/MySceneHostVM.vb b/Icarus/SceneHost/MySceneHostVM.vb
index 99a3ae3..1a4a06d 100644
--- a/Icarus/SceneHost/MySceneHostVM.vb
+++ b/Icarus/SceneHost/MySceneHostVM.vb
@@ -976,33 +976,15 @@ Public Class MySceneHostVM
                Map.refDispositionPanelVM.OnKeyDown(e.KeyData)
             Case ModifyModes.REFERENCE
             Case ModifyModes.STARTMACH
+               Map.refStartMachPanelVM.OnKeyDown(e.KeyData)
             Case ModifyModes.RIBS
+               Map.refRibPanelVM.OnKeyDown(e.KeyData)
             Case ModifyModes.SHELLNUMBER
                Map.refShellNumberPanelVM.OnKeyDown(e.KeyData)
             Case ModifyModes.AUXSOLIDS
                Map.refFilledSolidPanelVM.OnKeyDown(e.KeyData)
          End Select
       End If
-      '' Se in modalità edit L250
-      'If Map.refMainMenuVM.SelPage = Pages.VIEW AndAlso Not IsNothing(Map.refProjectVM.BTLStructureVM) AndAlso Map.refFreeContourManagerVM.bIsActive Then
-      '   ' Con DEL eseguo cancellazione delle entità selezionate
-      '   If e.KeyData = System.Windows.Forms.Keys.Delete Then
-      '      MainController.SetLastInteger(GDB_ID.SEL)
-      '      MainController.ExecuteCommand(Controller.CMD.DELETE)
-      '      ' Con SPAZIO ripeto l'ultimo comando
-      '   ElseIf e.KeyData = System.Windows.Forms.Keys.Space Then
-      '      MainController.RepeatLastCommand()
-      '      ' Con 'A' e in modalità continuazione, forzo il passaggio ad arco
-      '   ElseIf e.KeyData = System.Windows.Forms.Keys.A And MainController.GetContinue() Then
-      '      MainController.ContinueArcPDP()
-      '      ' Con 'L'  e in modalità continuazione, forzo il passaggio a retta
-      '   ElseIf e.KeyData = System.Windows.Forms.Keys.L And MainController.GetContinue() Then
-      '      MainController.ContinueLine2P()
-      '      ' Con 'V' cambio lo stato del check
-      '   ElseIf e.KeyData = System.Windows.Forms.Keys.V Then
-      '      Map.refFreeContourInputVM.ChangeInputBoxCheck()
-      '   End If
-      'End If
    End Sub
 
    Private Sub OnCloseGetDist(sender As System.Object)
@@ -1477,7 +1459,10 @@ Public Class MySceneHostVM
    Friend Sub StartMach_OnMouseUpScene(sender As Object, e As System.Windows.Forms.MouseEventArgs)
       ' Se eseguito drag
       If Not m_bDragToStart Then
-
+         ' se in scelta piano da oggetto resetto eventuale selezione
+         If Map.refRibPanelVM.bCPlaneObj_IsActive Then
+            EgtDeselectAll()
+         End If
          ' Se selezione da eseguire
       ElseIf m_nIdToSel <> GDB_ID.NULL Then
          If Map.refStartMachPanelVM.bCPlaneObj_IsActive Then
@@ -1558,7 +1543,10 @@ Public Class MySceneHostVM
    Friend Sub Rib_OnMouseUpScene(sender As Object, e As System.Windows.Forms.MouseEventArgs)
       ' Se eseguito drag
       If Not m_bDragToStart Then
-
+         ' se in scelta piano da oggetto resetto eventuale selezione
+         If Map.refRibPanelVM.bCPlaneObj_IsActive Then
+            EgtDeselectAll()
+         End If
          ' Se selezione da eseguire
       ElseIf m_nIdToSel <> GDB_ID.NULL Then
          If Map.refRibPanelVM.bCPlaneObj_IsActive Then
@@ -1640,7 +1628,10 @@ Public Class MySceneHostVM
    Friend Sub ShellNumber_OnMouseUpScene(sender As Object, e As System.Windows.Forms.MouseEventArgs)
       ' Se eseguito drag
       If Not m_bDragToStart Then
-
+         ' se in scelta piano da oggetto resetto eventuale selezione
+         If Map.refRibPanelVM.bCPlaneObj_IsActive Then
+            EgtDeselectAll()
+         End If
          ' Se selezione da eseguire
       ElseIf m_nIdToSel <> GDB_ID.NULL Then
          If Map.refShellNumberPanelVM.bCPlaneObj_IsActive Then
@@ -1722,7 +1713,10 @@ Public Class MySceneHostVM
    Friend Sub FilledSolid_OnMouseUpScene(sender As Object, e As System.Windows.Forms.MouseEventArgs)
       ' Se eseguito drag
       If Not m_bDragToStart Then
-
+         ' se in scelta piano da oggetto resetto eventuale selezione
+         If Map.refRibPanelVM.bCPlaneObj_IsActive Then
+            EgtDeselectAll()
+         End If
          ' Se selezione da eseguire
       ElseIf m_nIdToSel <> GDB_ID.NULL Then
          If Map.refFilledSolidPanelVM.bCPlaneObj_IsActive Then
diff --git a/Icarus/ShellNumberPanel/ShellNumberPanelVM.vb b/Icarus/ShellNumberPanel/ShellNumberPanelVM.vb
index 6f923f2..05a7904 100644
--- a/Icarus/ShellNumberPanel/ShellNumberPanelVM.vb
+++ b/Icarus/ShellNumberPanel/ShellNumberPanelVM.vb
@@ -218,7 +218,7 @@ Public Class ShellNumberPanelVM
          Return m_bAdd_IsChecked
       End Get
       Set(value As Boolean)
-         If Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 Then
+         If Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 AndAlso Not m_bCPlaneObj_IsActive Then
             m_bAdd_IsChecked = value
             If value Then
                m_bEdit_IsChecked = False
@@ -240,7 +240,7 @@ Public Class ShellNumberPanelVM
          Return m_bEdit_IsChecked
       End Get
       Set(value As Boolean)
-         If Not IsNothing(m_SelShellNumber) AndAlso Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 Then
+         If Not IsNothing(m_SelShellNumber) AndAlso Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 AndAlso Not m_bCPlaneObj_IsActive Then
             m_bEdit_IsChecked = value
             If value Then
                m_bAdd_IsChecked = False
@@ -264,7 +264,7 @@ Public Class ShellNumberPanelVM
          Return m_bGrid_IsChecked
       End Get
       Set(value As Boolean)
-         If Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 Then
+         If Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 AndAlso Not m_bCPlaneObj_IsActive Then
             m_bGrid_IsChecked = value
             If value Then
                m_bAdd_IsChecked = False
@@ -292,7 +292,7 @@ Public Class ShellNumberPanelVM
          Return m_bMove_IsChecked
       End Get
       Set(value As Boolean)
-         If Not IsNothing(m_SelShellNumber) AndAlso Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 Then
+         If Not IsNothing(m_SelShellNumber) AndAlso Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 AndAlso Not m_bCPlaneObj_IsActive Then
             m_bMove_IsChecked = value
             If value Then
                m_bAdd_IsChecked = False
@@ -316,7 +316,7 @@ Public Class ShellNumberPanelVM
          Return m_bRotate_IsChecked
       End Get
       Set(value As Boolean)
-         If Not IsNothing(m_SelShellNumber) AndAlso Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 Then
+         If Not IsNothing(m_SelShellNumber) AndAlso Not m_bMachParam_IsChecked AndAlso Map.refSceneHostVM.MainController.GetStep = 0 AndAlso Not m_bCPlaneObj_IsActive Then
             m_bRotate_IsChecked = value
             If value Then
                m_bAdd_IsChecked = False
@@ -340,7 +340,7 @@ Public Class ShellNumberPanelVM
          Return m_bMachParam_IsChecked
       End Get
       Set(value As Boolean)
-         If Not IsNothing(m_SelShellNumber) AndAlso Map.refSceneHostVM.MainController.GetStep = 0 AndAlso Not IsNothing(Map.refTopPanelVM.SelMachining) AndAlso value Then
+         If Not IsNothing(m_SelShellNumber) AndAlso Map.refSceneHostVM.MainController.GetStep = 0 AndAlso Not m_bCPlaneObj_IsActive AndAlso Not IsNothing(Map.refTopPanelVM.SelMachining) AndAlso value Then
             m_bMachParam_IsChecked = True
             m_bAdd_IsChecked = False
             m_bEdit_IsChecked = False
@@ -522,7 +522,6 @@ Public Class ShellNumberPanelVM
    Private m_cmdCPlaneObj As ICommand
    Private m_cmdDragMove As ICommand
    Private m_cmdDragRotate As ICommand
-   Private m_cmdMachParam As ICommand
 
 #End Region    ' FIELDS & PROPERTIES
 
@@ -723,9 +722,15 @@ Public Class ShellNumberPanelVM
             ' lo seleziono
             SelShellNumber = NewEntity
             NotifyPropertyChanged(NameOf(SelShellNumber))
-            ' creo layer per estrusione
-            Dim nNewExtrusionLayerId As Integer = EgtCreateGroup(m_nPartId)
-            EgtSetName(nNewExtrusionLayerId, LAY_NEWEXTRUSION)
+            ' verifico se esiste gia' layer estrusione e lo svuoto
+            Dim nNewExtrusionLayerId As Integer = EgtGetFirstNameInGroup(m_nPartId, LAY_NEWEXTRUSION)
+            If nNewExtrusionLayerId <> GDB_ID.NULL Then
+               EgtEmptyGroup(nNewExtrusionLayerId)
+            Else
+               ' altrimenti lo creo
+               nNewExtrusionLayerId = EgtCreateGroup(m_nPartId)
+               EgtSetName(nNewExtrusionLayerId, LAY_NEWEXTRUSION)
+            End If
             EgtSetCurrPartLayer(m_nPartId, nNewExtrusionLayerId)
             ' seleziono percorso da estrudere
             EgtDeselectAll()
@@ -814,7 +819,7 @@ Public Class ShellNumberPanelVM
    ''' Execute the CPlaneTop.  This method is invoked by the CPlaneTopCommand.
    ''' </summary>
    Public Sub Import(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.InsertShellNumber()
    End Sub
 
@@ -838,7 +843,7 @@ Public Class ShellNumberPanelVM
    ''' Execute the CPlaneTop.  This method is invoked by the CPlaneTopCommand.
    ''' </summary>
    Public Sub Line2P(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Dim nNewShellNumberLayerId As Integer = EgtGetFirstNameInGroup(m_nPartId, LAY_NEWRIB)
       If nNewShellNumberLayerId = GDB_ID.NULL Then nNewShellNumberLayerId = EgtCreateGroup(m_nPartId)
       EgtSetName(nNewShellNumberLayerId, LAY_NEWRIB)
@@ -863,7 +868,7 @@ Public Class ShellNumberPanelVM
    End Property
 
    Public Sub Delete()
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       If IsNothing(SelShellNumber) Then Return
       Dim bOk As Boolean = False
       Select Case m_SelShellNumber.Type
@@ -909,7 +914,7 @@ Public Class ShellNumberPanelVM
    ''' Execute the LinearDimension.  This method is invoked by the LinDimCommand.
    ''' </summary>
    Public Sub ModifyCurve(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       InitCommand(ShellNumberSelectionTypes.CURVE)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.MODIFYCURVE)
    End Sub
@@ -934,7 +939,7 @@ Public Class ShellNumberPanelVM
    ''' Execute the LinearDimension.  This method is invoked by the LinDimCommand.
    ''' </summary>
    Public Sub AddPointCurve(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       InitCommand(ShellNumberSelectionTypes.CURVE)
       If (Keyboard.Modifiers And ModifierKeys.Shift) = ModifierKeys.Shift Then
          Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.CURVETOARC)
@@ -963,7 +968,7 @@ Public Class ShellNumberPanelVM
    ''' Execute the LinearDimension.  This method is invoked by the LinDimCommand.
    ''' </summary>
    Public Sub RemovePointCurve(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       InitCommand(ShellNumberSelectionTypes.CURVE)
       If (Keyboard.Modifiers And ModifierKeys.Shift) = ModifierKeys.Shift Then
          Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.CURVETOLINE)
@@ -992,7 +997,7 @@ Public Class ShellNumberPanelVM
    ''' Execute the Extrude.  This method is invoked by the ExtrudeCommand.
    ''' </summary>
    Public Sub Extrude(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       InitCommand(ShellNumberSelectionTypes.EXTRUSION)
       If Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.EXTRUDE) Then
          m_bIsCreatingExtrusion = True
@@ -1020,7 +1025,7 @@ Public Class ShellNumberPanelVM
    ''' Execute the CPlaneTop.  This method is invoked by the CPlaneTopCommand.
    ''' </summary>
    Public Sub CPlaneTop(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.SetLastInteger(Controller.GRID_TYPE.TOP)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID)
    End Sub
@@ -1045,7 +1050,7 @@ Public Class ShellNumberPanelVM
    ''' Execute the CPlaneFront.  This method is invoked by the CPlaneFrontCommand.
    ''' </summary>
    Public Sub CPlaneFront(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.SetLastInteger(Controller.GRID_TYPE.FRONT)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID)
    End Sub
@@ -1070,7 +1075,7 @@ Public Class ShellNumberPanelVM
    ''' Execute the CPlaneRight.  This method is invoked by the CPlaneRightCommand.
    ''' </summary>
    Public Sub CPlaneRight(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.SetLastInteger(Controller.GRID_TYPE.RIGHT)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID)
    End Sub
@@ -1095,7 +1100,7 @@ Public Class ShellNumberPanelVM
    ''' Execute the CPlaneBack.  This method is invoked by the CPlaneBackCommand.
    ''' </summary>
    Public Sub CPlaneBack(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.SetLastInteger(Controller.GRID_TYPE.BACK)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID)
    End Sub
@@ -1120,7 +1125,7 @@ Public Class ShellNumberPanelVM
    ''' Execute the CPlaneLeft.  This method is invoked by the CPlaneLeftCommand.
    ''' </summary>
    Public Sub CPlaneLeft(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.SetLastInteger(Controller.GRID_TYPE.LEFT)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID)
    End Sub
@@ -1145,7 +1150,7 @@ Public Class ShellNumberPanelVM
    ''' Execute the CPlaneBottom.  This method is invoked by the CPlaneBottomCommand.
    ''' </summary>
    Public Sub CPlaneBottom(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.SetLastInteger(Controller.GRID_TYPE.BOTTOM)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID)
    End Sub
@@ -1170,7 +1175,7 @@ Public Class ShellNumberPanelVM
    ''' Execute the CPlaneElevation.  This method is invoked by the CPlaneElevationCommand.
    ''' </summary>
    Public Sub CPlaneElevation(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID_ELEVATION)
    End Sub
 
@@ -1194,7 +1199,7 @@ Public Class ShellNumberPanelVM
    ''' Execute the CPlaneOrigin.  This method is invoked by the CPlaneOriginCommand.
    ''' </summary>
    Public Sub CPlaneOrigin(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID_ORIGIN)
    End Sub
 
@@ -1218,7 +1223,7 @@ Public Class ShellNumberPanelVM
    ''' Execute the CPlaneRotate.  This method is invoked by the CPlaneRotateCommand.
    ''' </summary>
    Public Sub CPlaneRotate(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       If (Keyboard.Modifiers And ModifierKeys.Shift) <> ModifierKeys.Shift Then
          Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID_ROTATE)
       Else
@@ -1246,7 +1251,7 @@ Public Class ShellNumberPanelVM
    ''' Execute the CPlane3P.  This method is invoked by the CPlane3PCommand.
    ''' </summary>
    Public Sub CPlane3P(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID_3P)
    End Sub
 
@@ -1270,7 +1275,7 @@ Public Class ShellNumberPanelVM
    ''' Execute the CPlanePerpObj.  This method is invoked by the CPlanePerpObjCommand.
    ''' </summary>
    Public Sub CPlanePerpObj(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID_PERPCURVE)
    End Sub
 
@@ -1310,7 +1315,7 @@ Public Class ShellNumberPanelVM
    ''' Execute the CPlaneObj.  This method is invoked by the CPlaneObjCommand.
    ''' </summary>
    Public Sub CPlaneObj(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       ' salvo selezione precedente e deseleziono altri oggetti
       m_PrevSelObjs.Clear()
       Dim nSelObjId As Integer = EgtGetFirstSelectedObj()
@@ -1320,7 +1325,7 @@ Public Class ShellNumberPanelVM
       End While
       EgtDeselectAll()
       m_bCPlaneObj_IsActive = True
-    '  Map.refControllerInputPanelVM.PrepareInputBox("Grid from Selection", "Select the face of the object where to place the grid", "", False, False)
+      Map.refControllerInputPanelVM.ShowMessage("Grid from Selection", "Select the face of the object where to place the grid")
    End Sub
 
 #End Region ' CPlaneObj
@@ -1337,7 +1342,7 @@ Public Class ShellNumberPanelVM
    End Property
 
    Public Sub DragMove()
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       InitCommand(ShellNumberSelectionTypes.BOTH)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.MOVE)
    End Sub
@@ -1356,41 +1361,13 @@ Public Class ShellNumberPanelVM
    End Property
 
    Public Sub DragRotate()
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       InitCommand(ShellNumberSelectionTypes.BOTH)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.ROTATE)
    End Sub
 
 #End Region    ' DragRotate
 
-#Region "MachParam"
-
-   Public ReadOnly Property MachParam_Command As ICommand
-      Get
-         If m_cmdMachParam Is Nothing Then
-            m_cmdMachParam = New Command(AddressOf MachParam)
-         End If
-         Return m_cmdMachParam
-      End Get
-   End Property
-
-   Public Sub MachParam()
-      If IsNothing(Map.refTopPanelVM.SelMachining) Then Return
-      m_bAdd_IsChecked = False
-      m_bEdit_IsChecked = False
-      m_bGrid_IsChecked = False
-      m_bMove_IsChecked = False
-      m_bRotate_IsChecked = False
-      NotifyPropertyChanged(NameOf(bAdd_IsChecked))
-      NotifyPropertyChanged(NameOf(bEdit_IsChecked))
-      NotifyPropertyChanged(NameOf(bGrid_IsChecked))
-      NotifyPropertyChanged(NameOf(bMove_IsChecked))
-      NotifyPropertyChanged(NameOf(bRotate_IsChecked))
-      Map.refRightPanelVM.SetSelPanel(RightPanelVM.Panels.SHELLNUMBERPARAM)
-   End Sub
-
-#End Region    ' MachParam
-
 #End Region    ' COMMANDS
 
 End Class
diff --git a/Icarus/StartMachPanel/StartMachPanelVM.vb b/Icarus/StartMachPanel/StartMachPanelVM.vb
index 32176d6..7a90a5e 100644
--- a/Icarus/StartMachPanel/StartMachPanelVM.vb
+++ b/Icarus/StartMachPanel/StartMachPanelVM.vb
@@ -199,7 +199,7 @@ Public Class StartMachPanelVM
          Return m_bAdd_IsChecked
       End Get
       Set(value As Boolean)
-         If Map.refSceneHostVM.MainController.GetStep = 0 Then
+         If Map.refSceneHostVM.MainController.GetStep = 0 AndAlso Not m_bCPlaneObj_IsActive Then
             m_bAdd_IsChecked = value
             If value Then
                m_bEdit_IsChecked = False
@@ -221,7 +221,7 @@ Public Class StartMachPanelVM
          Return m_bEdit_IsChecked
       End Get
       Set(value As Boolean)
-         If Not IsNothing(m_SelStart) AndAlso Map.refSceneHostVM.MainController.GetStep = 0 Then
+         If Not IsNothing(m_SelStart) AndAlso Map.refSceneHostVM.MainController.GetStep = 0 AndAlso Not m_bCPlaneObj_IsActive Then
             m_bEdit_IsChecked = value
             If value Then
                m_bAdd_IsChecked = False
@@ -243,7 +243,7 @@ Public Class StartMachPanelVM
          Return m_bGrid_IsChecked
       End Get
       Set(value As Boolean)
-         If Map.refSceneHostVM.MainController.GetStep = 0 Then
+         If Map.refSceneHostVM.MainController.GetStep = 0 AndAlso Not m_bCPlaneObj_IsActive Then
             m_bGrid_IsChecked = value
             If value Then
                m_bAdd_IsChecked = False
@@ -271,7 +271,7 @@ Public Class StartMachPanelVM
          Return m_bMove_IsChecked
       End Get
       Set(value As Boolean)
-         If Not IsNothing(m_SelStart) AndAlso Map.refSceneHostVM.MainController.GetStep = 0 Then
+         If Not IsNothing(m_SelStart) AndAlso Map.refSceneHostVM.MainController.GetStep = 0 AndAlso Not m_bCPlaneObj_IsActive Then
             m_bMove_IsChecked = value
             If value Then
                m_bAdd_IsChecked = False
@@ -587,7 +587,7 @@ Public Class StartMachPanelVM
    ''' Execute the CPlaneTop.  This method is invoked by the CPlaneTopCommand.
    ''' </summary>
    Public Sub Point(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Dim nNewStartLayerId As Integer = EgtGetFirstNameInGroup( m_nPartId, LAY_NEWSTART)
       If nNewStartLayerId = GDB_ID.NULL Then
          nNewStartLayerId = EgtCreateGroup(m_nPartId)
@@ -620,7 +620,7 @@ Public Class StartMachPanelVM
    ''' Execute the CPlaneTop.  This method is invoked by the CPlaneTopCommand.
    ''' </summary>
    Public Sub Line2P(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Dim nNewStartLayerId As Integer = EgtGetFirstNameInGroup( m_nPartId, LAY_NEWSTART)
       If nNewStartLayerId = GDB_ID.NULL Then
          nNewStartLayerId = EgtCreateGroup(m_nPartId)
@@ -653,7 +653,7 @@ Public Class StartMachPanelVM
    ''' Execute the LinearDimension.  This method is invoked by the LinDimCommand.
    ''' </summary>
    Public Sub ModifyCurve(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       InitCommand()
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.MODIFYCURVE)
    End Sub
@@ -678,7 +678,7 @@ Public Class StartMachPanelVM
    ''' Execute the LinearDimension.  This method is invoked by the LinDimCommand.
    ''' </summary>
    Public Sub AddPointCurve(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       InitCommand()
       If (Keyboard.Modifiers And ModifierKeys.Shift) = ModifierKeys.Shift Then
          Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.CURVETOARC)
@@ -707,7 +707,7 @@ Public Class StartMachPanelVM
    ''' Execute the LinearDimension.  This method is invoked by the LinDimCommand.
    ''' </summary>
    Public Sub RemovePointCurve(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       If (Keyboard.Modifiers And ModifierKeys.Shift) = ModifierKeys.Shift Then
          InitCommand()
          Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.CURVETOLINE)
@@ -737,7 +737,7 @@ Public Class StartMachPanelVM
    ''' Execute the CPlaneTop.  This method is invoked by the CPlaneTopCommand.
    ''' </summary>
    Public Sub CPlaneTop(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.SetLastInteger(Controller.GRID_TYPE.TOP)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID)
    End Sub
@@ -762,7 +762,7 @@ Public Class StartMachPanelVM
    ''' Execute the CPlaneFront.  This method is invoked by the CPlaneFrontCommand.
    ''' </summary>
    Public Sub CPlaneFront(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.SetLastInteger(Controller.GRID_TYPE.FRONT)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID)
    End Sub
@@ -787,7 +787,7 @@ Public Class StartMachPanelVM
    ''' Execute the CPlaneRight.  This method is invoked by the CPlaneRightCommand.
    ''' </summary>
    Public Sub CPlaneRight(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.SetLastInteger(Controller.GRID_TYPE.RIGHT)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID)
    End Sub
@@ -812,7 +812,7 @@ Public Class StartMachPanelVM
    ''' Execute the CPlaneBack.  This method is invoked by the CPlaneBackCommand.
    ''' </summary>
    Public Sub CPlaneBack(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.SetLastInteger(Controller.GRID_TYPE.BACK)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID)
    End Sub
@@ -837,7 +837,7 @@ Public Class StartMachPanelVM
    ''' Execute the CPlaneLeft.  This method is invoked by the CPlaneLeftCommand.
    ''' </summary>
    Public Sub CPlaneLeft(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.SetLastInteger(Controller.GRID_TYPE.LEFT)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID)
    End Sub
@@ -862,7 +862,7 @@ Public Class StartMachPanelVM
    ''' Execute the CPlaneBottom.  This method is invoked by the CPlaneBottomCommand.
    ''' </summary>
    Public Sub CPlaneBottom(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.SetLastInteger(Controller.GRID_TYPE.BOTTOM)
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID)
    End Sub
@@ -887,7 +887,7 @@ Public Class StartMachPanelVM
    ''' Execute the CPlaneElevation.  This method is invoked by the CPlaneElevationCommand.
    ''' </summary>
    Public Sub CPlaneElevation(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID_ELEVATION)
    End Sub
 
@@ -911,7 +911,7 @@ Public Class StartMachPanelVM
    ''' Execute the CPlaneOrigin.  This method is invoked by the CPlaneOriginCommand.
    ''' </summary>
    Public Sub CPlaneOrigin(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.GRID_ORIGIN)
    End Sub
 
@@ -951,7 +951,7 @@ Public Class StartMachPanelVM
    ''' Execute the CPlaneObj.  This method is invoked by the CPlaneObjCommand.
    ''' </summary>
    Public Sub CPlaneObj(ByVal param As Object)
-      If Map.refSceneHostVM.MainController.GetStep <> 0 Then Return
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       ' salvo selezione precedente e deseleziono altri oggetti
       m_PrevSelObjs.Clear()
       Dim nSelObjId As Integer = EgtGetFirstSelectedObj()
@@ -961,7 +961,7 @@ Public Class StartMachPanelVM
       End While
       EgtDeselectAll()
       m_bCPlaneObj_IsActive = True
-    '  Map.refControllerInputPanelVM.PrepareInputBox("Grid from Selection", "Select the face of the object where to place the grid", "", False, False)
+      Map.refControllerInputPanelVM.ShowMessage("Grid from Selection", "Select the face of the object where to place the grid")
    End Sub
 
 #End Region ' CPlaneObj
@@ -978,6 +978,7 @@ Public Class StartMachPanelVM
    End Property
 
    Public Sub DragMove()
+      If Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       InitCommand()
       Map.refSceneHostVM.MainController.ExecuteCommand(Controller.CMD.MOVE)
    End Sub
@@ -996,7 +997,7 @@ Public Class StartMachPanelVM
    End Property
 
    Public Sub Delete()
-      If IsNothing(SelStart) Then Return
+      If IsNothing(SelStart) OrElse Map.refSceneHostVM.MainController.GetStep <> 0 OrElse m_bCPlaneObj_IsActive Then Return
       If EgtErase(m_SelStart.nId) Then
          Dim nSelStartIndex As Integer = m_StartList.IndexOf(SelStart)
          m_StartList.Remove(SelStart)