diff --git a/MainWindow/MainWindowViewModel.vb b/MainWindow/MainWindowViewModel.vb
index 91ef606..a9bb623 100644
--- a/MainWindow/MainWindowViewModel.vb
+++ b/MainWindow/MainWindowViewModel.vb
@@ -29,7 +29,7 @@ Namespace EgtCAM5
       ' Event commands
       ' MainWindow ContentRendered Event
 
-      Private m_Title As String
+      Private m_Title As String = String.Empty
       Public Property Title As String
          Get
             Return m_Title
diff --git a/ProjectPage/DoorsPanel/DoorsPanelView.xaml b/ProjectPage/DoorsPanel/DoorsPanelView.xaml
index d9b4c47..c1f308a 100644
--- a/ProjectPage/DoorsPanel/DoorsPanelView.xaml
+++ b/ProjectPage/DoorsPanel/DoorsPanelView.xaml
@@ -13,7 +13,7 @@
       </Button>
       <Button Command="{Binding DMachCommand}" Style="{StaticResource GridViewPanelButton}"
          Width="55" Content="DMACH"/>
-      <Button Command="{Binding MTableDbCommand}" ToolTip="{Binding MTableToolTip}"
+      <Button Command="{Binding MTableDbCommand}"
          Style="{StaticResource GridViewPanelButton}" Width="65" Content="MTABLE"/>
    </StackPanel>
 
diff --git a/ProjectPage/OptionPanel/DrawOptionPanel/ManageLayerExpander/ManageLayerExpanderView.xaml b/ProjectPage/OptionPanel/DrawOptionPanel/ManageLayerExpander/ManageLayerExpanderView.xaml
index 96dd6a2..f9ff49e 100644
--- a/ProjectPage/OptionPanel/DrawOptionPanel/ManageLayerExpander/ManageLayerExpanderView.xaml
+++ b/ProjectPage/OptionPanel/DrawOptionPanel/ManageLayerExpander/ManageLayerExpanderView.xaml
@@ -36,7 +36,7 @@
                   <Grid>
                      <interactivity:Interaction.Triggers>
                         <interactivity:EventTrigger EventName="MouseUp">
-                           <interactivity:InvokeCommandAction Command="{Binding TreeViewMouseUpCommand}" CommandParameter="{Binding ElementName=LayerTreeView,Path=SelectedItem}"/>
+                           <interactivity:InvokeCommandAction Command="{Binding Path=DataContext.TreeViewMouseUpCommand,RelativeSource={RelativeSource AncestorType={x:Type UserControl}}}" CommandParameter="{Binding ElementName=LayerTreeView,Path=SelectedItem}"/>
                         </interactivity:EventTrigger>
                         <interactivity:EventTrigger EventName="PreviewMouseRightButtonDown">
                            <expression:ChangePropertyAction PropertyName="IsRightSelected" Value="true" TargetObject="{Binding}"/>
diff --git a/ProjectPage/OptionPanel/DrawOptionPanel/ManageLayerExpander/ManageLayerExpanderViewModel.vb b/ProjectPage/OptionPanel/DrawOptionPanel/ManageLayerExpander/ManageLayerExpanderViewModel.vb
index 599fc6a..9c9a648 100644
--- a/ProjectPage/OptionPanel/DrawOptionPanel/ManageLayerExpander/ManageLayerExpanderViewModel.vb
+++ b/ProjectPage/OptionPanel/DrawOptionPanel/ManageLayerExpander/ManageLayerExpanderViewModel.vb
@@ -343,7 +343,7 @@ Namespace EgtCAM5
       Public ReadOnly Property TreeViewMouseUpCommand As ICommand
          Get
             If m_cmdTreeViewMouseUp Is Nothing Then
-               m_cmdTreeViewMouseUp = New RelayCommand(AddressOf TreeViewMouseUp, AddressOf CanTreeViewMouseUp)
+               m_cmdTreeViewMouseUp = New RelayCommand(AddressOf TreeViewMouseUp)
             End If
             Return m_cmdTreeViewMouseUp
          End Get
@@ -384,13 +384,6 @@ Namespace EgtCAM5
          'End If
       End Sub
 
-      ''' <summary>
-      ''' Returns always true.
-      ''' </summary>
-      Private Function CanTreeViewMouseUp(ByVal param As Object) As Boolean
-         Return True
-      End Function
-
 #End Region ' TreeViewMouseUpCommand
 
 #Region "SelectCommand"
diff --git a/ProjectPage/OptionPanel/MachiningOptionPanel/OperationExpander/DispositionParameterExpander/DispositionParameterExpanderViewModel.vb b/ProjectPage/OptionPanel/MachiningOptionPanel/OperationExpander/DispositionParameterExpander/DispositionParameterExpanderViewModel.vb
index f8b8987..a5acefe 100644
--- a/ProjectPage/OptionPanel/MachiningOptionPanel/OperationExpander/DispositionParameterExpander/DispositionParameterExpanderViewModel.vb
+++ b/ProjectPage/OptionPanel/MachiningOptionPanel/OperationExpander/DispositionParameterExpander/DispositionParameterExpanderViewModel.vb
@@ -251,6 +251,12 @@ Namespace EgtCAM5
          End Get
       End Property
 
+      Public ReadOnly Property OkMsg As String
+         Get
+            Return ""
+         End Get
+      End Property
+
 #End Region    ' Messages
 
       ' Definizione comandi
@@ -518,7 +524,7 @@ Namespace EgtCAM5
          End If
       End Sub
 
-      Public Shared Function MoveRawPartPartAndFixture(nMoveId As Integer, vtMove As Vector3d) As Boolean
+      Public Shared Function MoveRawPartPartAndFixture(nMoveId As Integer, vtMove As Vector3d, Optional nCount As Integer = 1) As Boolean
          Dim bErrorMoving As Boolean = False
          ' Muovo gli oggetti selezionati se consentito
          If nMoveId = GDB_ID.SEL Then
@@ -586,12 +592,18 @@ Namespace EgtCAM5
                If Not DispositionParameterExpanderViewModel.VerifyRawPartFixturePos(nMoveId, vtMove, vtRefMove) Then
                   bErrorVerify = True
                End If
+               'Dim sOut As String = "VerifyRaw : Count=" & nCount & " Err=" & If(bErrorVerify, "1", "0") &
+               '                              " Move=" & LenToString(vtMove.x, 3) & "," & LenToString(vtMove.y, 3) &
+               '                              " RefMove=" & LenToString(vtRefMove.x, 3) & "," & LenToString(vtRefMove.y, 3)
+               'EgtOutLog(sOut)
             End If
          End If
-         ' se non c'è errore ma c'è spostamento per correzione riferimento
-         If Not bErrorVerify AndAlso Not vtRefMove.IsSmall Then
-            ' provo a spostare
-            bErrorVerify = Not MoveRawPartPartAndFixture(nMoveId, vtRefMove)
+         ' Se non c'è errore ma necessaria correzione riferimento
+         If Not bErrorVerify AndAlso Not vtRefMove.IsSmall() Then
+            ' provo a correggere (max 1 prova)
+            If nCount < 2 Then
+               bErrorVerify = Not MoveRawPartPartAndFixture(nMoveId, vtRefMove, nCount + 1)
+            End If
          End If
          ' Se c'è almeno uno spostamento non valido
          If bErrorVerify Then
@@ -859,40 +871,36 @@ Namespace EgtCAM5
                      EgtOffsetCurve(ccompoRawPartOutlineOffsetId, dArcRadius, OFF_TYPE.FILLET)
                      ' recupero centro dell'arco di riferimento
                      Dim ptArcCenter As Point3d
-                     EgtCenterPoint(arcRefId, ccompoRawPartOutlineOffsetId, ptArcCenter)
+                     EgtCenterPoint(arcRefId, ccompoRawPartOutlineId, ptArcCenter)
                      ' Creo un segmento avente origine nel centro dell'arco e direzione opposta a quella del movimento
-                     Dim nDistLine As Integer = EgtCreateLinePVL(EgtGetParent(ccompoRawPartOutlineId), ptArcCenter, -vtOrigMove.Loc(ccompoRawPartOutlineId), 10000)
+                     Dim nDistLine As Integer = EgtCreateLinePVL(EgtGetParent(ccompoRawPartOutlineId), ptArcCenter, vtOrigMove.Loc(ccompoRawPartOutlineId), 10000)
                      ' cerco punto di intersezione tra il segmento e l'offset
                      Dim ptDist As Point3d
                      If EgtIntersectionPoint(nDistLine, ccompoRawPartOutlineOffsetId, ptArcCenter, ptDist) Then
                         ' calcolo il vettore di spostamento necessario ad allinearli
-                        Dim vtDelta As Vector3d = ptDist - ptArcCenter
+                        Dim vtDelta As Vector3d = -(ptDist - ptArcCenter)
                         vtDelta.z = 0
                         ' se il vettore non è nullo
                         If Not vtDelta.IsSmall() Then
+                           vtDelta = vtDelta.Glob(ccompoRawPartOutlineId)
                            ' il vettore da restituire è nullo, quindi lo inizializzo
                            If vtRefMove.IsSmall() Then
-                              vtRefMove = vtDelta.Glob(ccompoRawPartOutlineId)
+                              vtRefMove = vtDelta
                               ' altrimenti lo confronto
                            Else
                               ' per ogni coordinata devo prendere il massimo in direzione opposta allo spostamento originale
                               ' calcolo il versore nella direzione del movimento
                               Dim vtMoveVers As New Vector3d(vtOrigMove)
                               vtMoveVers.Normalize()
-                              If (vtDelta * vtMoveVers) > (vtRefMove * vtMoveVers) Then
+                              If (vtDelta * vtMoveVers) < (vtRefMove * vtMoveVers) Then
                                  vtRefMove = vtDelta
                               End If
                            End If
                         End If
                      End If
-                     '' verifico quale è il punto dell'offset vicino al centro dell'arco di riferimento
-                     'Dim dDist As Double
-                     'Dim ptMin As Point3d
-                     'Dim nSide As Integer
-                     'EgtGetMinDistPntSidePointCurve(ptArcCenter, ccompoRawPartOutlineOffsetId, Vector3d.Z_AX, dDist, ptMin, nSide)
-                     ' cancello offset e segmento
-                     EgtErase(ccompoRawPartOutlineOffsetId)
+                     ' cancello segmento e offset
                      EgtErase(nDistLine)
+                     EgtErase(ccompoRawPartOutlineOffsetId)
                End Select
             End If
             nFixtureId = EgtGetNextFixture(nFixtureId)
diff --git a/ProjectPage/OptionPanel/MachiningOptionPanel/OperationExpander/MachiningParameterExpander/MachiningParameterExpanderViewModel.vb b/ProjectPage/OptionPanel/MachiningOptionPanel/OperationExpander/MachiningParameterExpander/MachiningParameterExpanderViewModel.vb
index a668e47..3cbdfb1 100644
--- a/ProjectPage/OptionPanel/MachiningOptionPanel/OperationExpander/MachiningParameterExpander/MachiningParameterExpanderViewModel.vb
+++ b/ProjectPage/OptionPanel/MachiningOptionPanel/OperationExpander/MachiningParameterExpander/MachiningParameterExpanderViewModel.vb
@@ -2,9 +2,13 @@
 Imports System.Collections.ObjectModel
 Imports EgtUILib
 
+Namespace EgtCAM5
+
 Public Class MachiningParameterExpanderViewModel
    Implements INotifyPropertyChanged
 
+   Private m_bUpdating As Boolean = True
+
    Friend m_Type As Integer
    Public ReadOnly Property Type As Integer
       Get
@@ -28,6 +32,7 @@ Public Class MachiningParameterExpanderViewModel
          Return bInvert
       End Get
       Set(value As Boolean)
+         If m_bUpdating Then Return
          EgtSetMachiningParam(MCH_MP.INVERT, value)
       End Set
    End Property
@@ -39,6 +44,7 @@ Public Class MachiningParameterExpanderViewModel
          Return sDepth
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          EgtSetMachiningParam(MCH_MP.DEPTH_STR, value)
       End Set
    End Property
@@ -58,6 +64,7 @@ Public Class MachiningParameterExpanderViewModel
          Return IdNameStruct.SearchToId(nHeadSide, HeadSideList)
       End Get
       Set(value As Integer)
+         If m_bUpdating Then Return
          EgtSetMachiningParam(MCH_MP.HEADSIDE, IdNameStruct.SearchFromId(value, HeadSideList))
       End Set
    End Property
@@ -77,6 +84,7 @@ Public Class MachiningParameterExpanderViewModel
          Return IdNameStruct.SearchToId(nWorkSide, WorkSideList)
       End Get
       Set(value As Integer)
+         If m_bUpdating Then Return
          EgtSetMachiningParam(MCH_MP.WORKSIDE, IdNameStruct.SearchFromId(value, WorkSideList))
       End Set
    End Property
@@ -88,6 +96,7 @@ Public Class MachiningParameterExpanderViewModel
          Return sUserNotes
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          EgtSetMachiningParam(MCH_MP.USERNOTES, value)
       End Set
    End Property
@@ -99,6 +108,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dStartPos, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dStartPos As Double = 0
          StringToLen(value, dStartPos)
          EgtSetMachiningParam(MCH_MP.STARTPOS, dStartPos)
@@ -112,6 +122,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dReturnPos, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dReturnPos As Double = 0
          StringToLen(value, dReturnPos)
          EgtSetMachiningParam(MCH_MP.RETURNPOS, dReturnPos)
@@ -125,6 +136,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dOverLap, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dOverLap As Double = 0
          StringToLen(value, dOverLap)
          EgtSetMachiningParam(MCH_MP.OVERL, dOverLap)
@@ -138,6 +150,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dThrouAddLen, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dThrouAddLen As Double = 0
          StringToLen(value, dThrouAddLen)
          EgtSetMachiningParam(MCH_MP.THROUADDLEN, dThrouAddLen)
@@ -178,6 +191,7 @@ Public Class MachiningParameterExpanderViewModel
          End If
       End Get
       Set(value As Integer)
+         If m_bUpdating Then Return
          If Not IsNothing(m_StepTypeList) Then
             If m_StepTypeGetError Then
                EgtSetMachiningParam(MCH_MP.STEPTYPE, IdNameStruct.SearchFromId(value, m_StepTypeList))
@@ -193,6 +207,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dStepPar, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dStepPar As Double = 0
          StringToLen(value, dStepPar)
          EgtSetMachiningParam(MCH_MP.STEP_, dStepPar)
@@ -206,6 +221,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dStartSlowLen, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dStartSlowLen As Double = 0
          StringToLen(value, dStartSlowLen)
          EgtSetMachiningParam(MCH_MP.STARTSLOWLEN, dStartSlowLen)
@@ -219,6 +235,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dEndSlowLen, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dEndSlowLen As Double = 0
          StringToLen(value, dEndSlowLen)
          EgtSetMachiningParam(MCH_MP.ENDSLOWLEN, dEndSlowLen)
@@ -232,6 +249,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dSideAngle, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dSideAngle As Double = 0
          StringToLen(value, dSideAngle)
          EgtSetMachiningParam(MCH_MP.SIDEANGLE, dSideAngle)
@@ -245,6 +263,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dOffsetSr, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dOffsetSr As Double = 0
          StringToLen(value, dOffsetSr)
          EgtSetMachiningParam(MCH_MP.OFFSR, dOffsetSr)
@@ -258,6 +277,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dOffsetSl, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dOffsetSl As Double = 0
          StringToLen(value, dOffsetSl)
          EgtSetMachiningParam(MCH_MP.OFFSL, dOffsetSl)
@@ -271,6 +291,7 @@ Public Class MachiningParameterExpanderViewModel
          Return bLeaveTab
       End Get
       Set(value As Boolean)
+         If m_bUpdating Then Return
          EgtSetMachiningParam(MCH_MP.LEAVETAB, value)
       End Set
    End Property
@@ -282,6 +303,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dTabLen, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dTabLen As Double = 0
          StringToLen(value, dTabLen)
          EgtSetMachiningParam(MCH_MP.TABLEN, dTabLen)
@@ -295,6 +317,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dTabHeight, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dTabHeight As Double = 0
          StringToLen(value, dTabHeight)
          EgtSetMachiningParam(MCH_MP.TABHEIGHT, dTabHeight)
@@ -308,6 +331,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dTabAngle, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dTabAngle As Double = 0
          StringToLen(value, dTabAngle)
          EgtSetMachiningParam(MCH_MP.TABANGLE, dTabAngle)
@@ -321,6 +345,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dTabDist, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dTabDist As Double = 0
          StringToLen(value, dTabDist)
          EgtSetMachiningParam(MCH_MP.TABDIST, dTabDist)
@@ -359,6 +384,7 @@ Public Class MachiningParameterExpanderViewModel
          End If
       End Get
       Set(value As Integer)
+         If m_bUpdating Then Return
          If Not IsNothing(m_LeadInTypeList) Then
             If m_LeadInTypeGetError Then
                EgtSetMachiningParam(MCH_MP.LEADINTYPE, IdNameStruct.SearchFromId(value, m_LeadInTypeList))
@@ -374,6 +400,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dStartAddLen, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dStartAddLen As Double = 0
          StringToLen(value, dStartAddLen)
          EgtSetMachiningParam(MCH_MP.STARTADDLEN, dStartAddLen)
@@ -387,6 +414,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dLiTang, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dLiTang As Double = 0
          StringToLen(value, dLiTang)
          EgtSetMachiningParam(MCH_MP.LITANG, dLiTang)
@@ -400,6 +428,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dLiPerp, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dLiPerp As Double = 0
          StringToLen(value, dLiPerp)
          EgtSetMachiningParam(MCH_MP.LIPERP, dLiPerp)
@@ -413,6 +442,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dLiElev, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dLiElev As Double = 0
          StringToLen(value, dLiElev)
          EgtSetMachiningParam(MCH_MP.LIELEV, dLiElev)
@@ -426,6 +456,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dLiCompLen, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dLiCompLen As Double = 0
          StringToLen(value, dLiCompLen)
          EgtSetMachiningParam(MCH_MP.LICOMPLEN, dLiCompLen)
@@ -464,6 +495,7 @@ Public Class MachiningParameterExpanderViewModel
          End If
       End Get
       Set(value As Integer)
+         If m_bUpdating Then Return
          If Not IsNothing(m_LeadOutTypeList) Then
             If m_LeadOutTypeGetError Then
                EgtSetMachiningParam(MCH_MP.LEADOUTTYPE, IdNameStruct.SearchFromId(value, m_LeadOutTypeList))
@@ -479,6 +511,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dEndAddLen, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dEndAddLen As Double = 0
          StringToLen(value, dEndAddLen)
          EgtSetMachiningParam(MCH_MP.ENDADDLEN, dEndAddLen)
@@ -492,6 +525,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dLoTang, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dLoTang As Double = 0
          StringToLen(value, dLoTang)
          EgtSetMachiningParam(MCH_MP.LOTANG, dLoTang)
@@ -505,6 +539,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dLoPerp, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dLoPerp As Double = 0
          StringToLen(value, dLoPerp)
          EgtSetMachiningParam(MCH_MP.LOPERP, dLoPerp)
@@ -518,6 +553,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dLoElev, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dLoElev As Double = 0
          StringToLen(value, dLoElev)
          EgtSetMachiningParam(MCH_MP.LOELEV, dLoElev)
@@ -531,6 +567,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dLoCompLen, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dLoCompLen As Double = 0
          StringToLen(value, dLoCompLen)
          EgtSetMachiningParam(MCH_MP.LOCOMPLEN, dLoCompLen)
@@ -561,6 +598,7 @@ Public Class MachiningParameterExpanderViewModel
          End If
       End Get
       Set(value As Integer)
+         If m_bUpdating Then Return
          If Not IsNothing(m_ExtLinkTypeList) Then
             If m_ExtLinkTypeGetError Then
                EgtSetMachiningParam(MCH_MP.EXTLINKTYPE, IdNameStruct.SearchFromId(value, m_ExtLinkTypeList))
@@ -598,6 +636,7 @@ Public Class MachiningParameterExpanderViewModel
          End If
       End Get
       Set(value As Integer)
+         If m_bUpdating Then Return
          If Not IsNothing(m_CurveUseList) Then
             If m_CurveUseGetError Then
                EgtSetMachiningParam(MCH_MP.CURVEUSE, IdNameStruct.SearchFromId(value, m_CurveUseList))
@@ -613,6 +652,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dApprox, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dApprox As Double = 0
          StringToLen(value, dApprox)
          EgtSetMachiningParam(MCH_MP.APPROX, dApprox)
@@ -626,6 +666,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dStepExtArc, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dStepExtArc As Double = 0
          StringToLen(value, dStepExtArc)
          EgtSetMachiningParam(MCH_MP.STEPEXTARC, dStepExtArc)
@@ -639,6 +680,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dStepIntArc, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dStepIntArc As Double = 0
          StringToLen(value, dStepIntArc)
          EgtSetMachiningParam(MCH_MP.STEPINTARC, dStepIntArc)
@@ -652,6 +694,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dSpeed, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dSpeed As Double = 0
          StringToLen(value, dSpeed)
          EgtSetMachiningParam(MCH_MP.SPEED, dSpeed)
@@ -665,6 +708,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dFeed, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dFeed As Double = 0
          StringToLen(value, dFeed)
          EgtSetMachiningParam(MCH_MP.FEED, dFeed)
@@ -678,6 +722,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dTipFeed, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dTipFeed As Double = 0
          StringToLen(value, dTipFeed)
          EgtSetMachiningParam(MCH_MP.TIPFEED, dTipFeed)
@@ -691,6 +736,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dStartFeed, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dStartFeed As Double = 0
          StringToLen(value, dStartFeed)
          EgtSetMachiningParam(MCH_MP.STARTFEED, dStartFeed)
@@ -704,6 +750,7 @@ Public Class MachiningParameterExpanderViewModel
          Return LenToString(dEndFeed, 4)
       End Get
       Set(value As String)
+         If m_bUpdating Then Return
          Dim dEndFeed As Double = 0
          StringToLen(value, dEndFeed)
          EgtSetMachiningParam(MCH_MP.ENDFEED, dEndFeed)
@@ -971,7 +1018,7 @@ Public Class MachiningParameterExpanderViewModel
       End Get
    End Property
 
-   Public ReadOnly Property EndFeedTxBl As String
+   Public ReadOnly Property EndFeedMsg As String
       Get
          Return EgtMsg(MSG_MACHININGSDBPAGE + 66)
       End Get
@@ -1004,6 +1051,7 @@ Public Class MachiningParameterExpanderViewModel
 #End Region
 
    Private Sub UpdateParamValues()
+      m_bUpdating = True
       NotifyPropertyChanged("Type")
       NotifyPropertyChanged("Tool")
       NotifyPropertyChanged("Invert")
@@ -1053,8 +1101,12 @@ Public Class MachiningParameterExpanderViewModel
       NotifyPropertyChanged("TipFeed")
       NotifyPropertyChanged("StartFeed")
       NotifyPropertyChanged("EndFeed")
+      m_bUpdating = False
    End Sub
 
+   ' Definizione comando
+   Private m_cmdReloadMachining As ICommand
+
    Sub New(ByRef m_UpdateParamValues As Action)
       m_UpdateParamValues = AddressOf UpdateParamValues
    End Sub
@@ -1082,6 +1134,69 @@ Public Class MachiningParameterExpanderViewModel
       End Select
    End Function
 
+#Region "ReloadMachiningCommand"
+
+      ''' <summary>
+      ''' Restituisce funzione per ricalcolo lavorazione.
+      ''' </summary>
+      Public ReadOnly Property ReloadMachiningCommand As ICommand
+         Get
+            If m_cmdReloadMachining Is Nothing Then
+               m_cmdReloadMachining = New RelayCommand(AddressOf ReloadMachining, AddressOf CanReloadMachining)
+            End If
+            Return m_cmdReloadMachining
+         End Get
+      End Property
+
+      ''' <summary>
+      ''' Ricalcola una lavorazione.
+      ''' </summary>
+      Public Sub ReloadMachining(ByVal param As Object)
+         ' Aggiorno valore depth
+         NotifyPropertyChanged("Depth")
+         ' Carico tutta la geometria selezionata in una lista
+         Dim SelectedGeometry As New List(Of Integer)
+         Dim EntityIndex As Integer = EgtGetFirstSelectedObj()
+         While EntityIndex <> GDB_ID.NULL
+            SelectedGeometry.Add(EntityIndex)
+            EntityIndex = EgtGetNextSelectedObj()
+         End While
+         ' Verifico se la geometria è cambiata, confrontando selezione attuale con geometria di lavorazione
+         Dim ModifiedGeometry As Boolean = False
+         Dim CountIndex As Integer = 0
+         EntityIndex = 0
+         Dim SubEntityIndex As Integer = 0     ' Sottocomponente, per ora non usato ma necessario
+         While EgtGetMachiningGeometry(CountIndex, EntityIndex, SubEntityIndex)
+            If SubEntityIndex = GDB_ID.NULL And CountIndex < SelectedGeometry.Count() Then
+               If SelectedGeometry(CountIndex) <> EntityIndex Then
+                  ModifiedGeometry = True
+                  Exit While
+               End If
+            Else
+               ModifiedGeometry = True
+               Exit While
+            End If
+            CountIndex += 1
+         End While
+         If SelectedGeometry.Count <> CountIndex Then
+            ModifiedGeometry = True
+         End If
+         ' Imposto geometria selezionata come geometria di lavorazione
+         If ModifiedGeometry Then EgtSetMachiningGeometry(SelectedGeometry.ToArray)
+         ' Se necessario ricalcolo la lavorazione
+         EgtApplyMachining(ModifiedGeometry)
+         EgtDraw()
+      End Sub
+
+      ''' <summary>
+      ''' Returns always true.
+      ''' </summary>
+      Private Function CanReloadMachining(ByVal param As Object) As Boolean
+         Return True
+      End Function
+
+#End Region ' ReloadMachiningCommand
+
    Public Event PropertyChanged As PropertyChangedEventHandler Implements INotifyPropertyChanged.PropertyChanged
 
    Public Sub NotifyPropertyChanged(propName As String)
@@ -1090,6 +1205,9 @@ Public Class MachiningParameterExpanderViewModel
 
 End Class
 
+End Namespace
+
+
 ''' <summary>
 ''' Class that represent a Converter that use machining type and param type, to set the visibility state of the param type.
 ''' </summary>
diff --git a/ProjectPage/OptionPanel/MachiningOptionPanel/OperationExpander/OperationExpanderViewModel.vb b/ProjectPage/OptionPanel/MachiningOptionPanel/OperationExpander/OperationExpanderViewModel.vb
index 1462bf2..c8100b7 100644
--- a/ProjectPage/OptionPanel/MachiningOptionPanel/OperationExpander/OperationExpanderViewModel.vb
+++ b/ProjectPage/OptionPanel/MachiningOptionPanel/OperationExpander/OperationExpanderViewModel.vb
@@ -110,70 +110,65 @@ Namespace EgtCAM5
                   End If
                   ParametersExpanderName = m_SelectedOperation.Name
                   m_CurrExpandedExpander = MachiningOptionPanelExpander.OPERATIONPARAMETERS
-                  Select Case SelectedOperation.m_Type
-                     Case MCH_OY.DISP
-                        ' Abilito la selezione di tutti i tipi di geometria
-                        Application.Msn.NotifyColleagues(Application.SETSCENESELMODE, SceneSelModeOpt.ALL)
-                        ' Verifico se c'è un grezzo nella disposizione corrente
-                        Dim bFirstRaw As Boolean = True
-                        Dim nCurrPhase As Integer = EgtGetCurrPhase()
-                        Dim nRawPartId As Integer = EgtGetFirstRawPart()
-                        While nRawPartId <> GDB_ID.NULL
-                           If EgtVerifyRawPartPhase(nRawPartId, nCurrPhase) Then
-                              bFirstRaw = False
-                              Exit While
-                           End If
-                           nRawPartId = EgtGetNextRawPart(nRawPartId)
-                        End While
-                        ' Lancio funzione che inizializza la disposizione
-                        m_OpenDispositionFunction(bFirstRaw)
-                        ' Nascondo tutte le lavorazioni
-                        Dim nOpId As Integer = EgtGetFirstOperation()
-                        While nOpId <> GDB_ID.NULL
-                           Dim nOpType As Integer = EgtGetOperationType(nOpId)
-                           If nOpType = MCH_OY.DRILLING OrElse nOpType = MCH_OY.SAWING OrElse nOpType = MCH_OY.MILLING OrElse nOpType = MCH_OY.POCKETING OrElse nOpType = MCH_OY.MORTISING _
-                              OrElse nOpType = MCH_OY.SAWROUGHING OrElse nOpType = MCH_OY.SAWFINISHING Then
-                              EgtSetStatus(nOpId, GDB_ST.OFF)
-                           End If
-                           nOpId = EgtGetNextOperation(nOpId)
-                        End While
-                        EgtDraw()
-                     Case MCH_OY.DRILLING, MCH_OY.SAWING, MCH_OY.MILLING, MCH_OY.MORTISING, MCH_OY.POCKETING, MCH_OY.SAWROUGHING, MCH_OY.SAWFINISHING
-                        ' Leggo il tipo di operazione per impostare il tipo di selezione
-                        Dim OperationType As Integer = -1
-                        EgtGetMachiningParam(MCH_MP.TYPE, OperationType)
-                        ' Abilito la selezione delle lavorazioni
-                        Application.Msn.NotifyColleagues(Application.SETSCENESELTYPE, SceneSelTypeOpt.MACHINING)
-                        ' Abilito la selezione dei giusti tipi di geometria
-                        Select Case OperationType
-                           Case MCH_OY.SAWING
-                              Application.Msn.NotifyColleagues(Application.SETSCENESELMODE, m_SelGeomSawing)
-                           Case MCH_OY.DRILLING
-                              Application.Msn.NotifyColleagues(Application.SETSCENESELMODE, m_SelGeomDrilling)
-                           Case MCH_OY.MILLING
-                              Application.Msn.NotifyColleagues(Application.SETSCENESELMODE, m_SelGeomMilling)
-                           Case MCH_OY.POCKETING
-                              Application.Msn.NotifyColleagues(Application.SETSCENESELMODE, m_SelGeomPocketing)
-                           Case MCH_OY.MORTISING
-                              Application.Msn.NotifyColleagues(Application.SETSCENESELMODE, m_SelGeomMortising)
-                           Case MCH_OY.SAWROUGHING
-                              Application.Msn.NotifyColleagues(Application.SETSCENESELMODE, m_SelGeomSawRoughing)
-                           Case MCH_OY.SAWFINISHING
-                              Application.Msn.NotifyColleagues(Application.SETSCENESELMODE, m_SelGeomSawFinishing)
-                        End Select
-                  End Select
+                  If IsValidDispositionType(SelectedOperation.m_Type) Then
+                     ' Abilito la selezione di tutti i tipi di geometria
+                     Application.Msn.NotifyColleagues(Application.SETSCENESELMODE, SceneSelModeOpt.ALL)
+                     ' Verifico se c'è un grezzo nella disposizione corrente
+                     Dim bFirstRaw As Boolean = True
+                     Dim nRawPartId As Integer = EgtGetFirstRawPart()
+                     While nRawPartId <> GDB_ID.NULL
+                        If EgtVerifyRawPartCurrPhase(nRawPartId) Then
+                           bFirstRaw = False
+                           Exit While
+                        End If
+                        nRawPartId = EgtGetNextRawPart(nRawPartId)
+                     End While
+                     ' Lancio funzione che inizializza la disposizione
+                     m_OpenDispositionFunction(bFirstRaw)
+                     ' Nascondo tutte le lavorazioni
+                     Dim nOpId As Integer = EgtGetFirstOperation()
+                     While nOpId <> GDB_ID.NULL
+                        If IsValidMachiningType(EgtGetOperationType(nOpId)) Then
+                           EgtSetOperationStatus(nOpId, False)
+                        End If
+                        nOpId = EgtGetNextOperation(nOpId)
+                     End While
+                     EgtDraw()
+                  ElseIf IsValidMachiningType(SelectedOperation.m_Type) Then
+                     ' Leggo il tipo di operazione per impostare il tipo di selezione
+                     Dim OperationType As Integer = -1
+                     EgtGetMachiningParam(MCH_MP.TYPE, OperationType)
+                     ' Abilito la selezione delle lavorazioni
+                     Application.Msn.NotifyColleagues(Application.SETSCENESELTYPE, SceneSelTypeOpt.MACHINING)
+                     ' Abilito la selezione dei giusti tipi di geometria
+                     Select Case OperationType
+                     Case MCH_OY.SAWING
+                        Application.Msn.NotifyColleagues(Application.SETSCENESELMODE, m_SelGeomSawing)
+                     Case MCH_OY.DRILLING
+                        Application.Msn.NotifyColleagues(Application.SETSCENESELMODE, m_SelGeomDrilling)
+                     Case MCH_OY.MILLING
+                        Application.Msn.NotifyColleagues(Application.SETSCENESELMODE, m_SelGeomMilling)
+                     Case MCH_OY.POCKETING
+                        Application.Msn.NotifyColleagues(Application.SETSCENESELMODE, m_SelGeomPocketing)
+                     Case MCH_OY.MORTISING
+                        Application.Msn.NotifyColleagues(Application.SETSCENESELMODE, m_SelGeomMortising)
+                     Case MCH_OY.SAWROUGHING
+                        Application.Msn.NotifyColleagues(Application.SETSCENESELMODE, m_SelGeomSawRoughing)
+                     Case MCH_OY.SAWFINISHING
+                        Application.Msn.NotifyColleagues(Application.SETSCENESELMODE, m_SelGeomSawFinishing)
+                     End Select
+                  End If
                Else
                   If m_CurrExpandedExpander = MachiningOptionPanelExpander.OPERATIONLIST Then
                      ListIsExpanded = True
                   End If
                   If SelectedOperation.m_Type = MCH_OY.DISP Then
-                     ' Riattivo tutte le lavorazioni
+                     ' Visualizzo tutte le lavorazioni della fase corrente
+                     Dim nCurrPhase = EgtGetCurrPhase()
                      Dim nOpId As Integer = EgtGetFirstOperation()
                      While nOpId <> GDB_ID.NULL
-                        Dim nOpType As Integer = EgtGetOperationType(nOpId)
-                        If nOpType = MCH_OY.DRILLING OrElse nOpType = MCH_OY.SAWING OrElse nOpType = MCH_OY.MILLING OrElse nOpType = MCH_OY.POCKETING OrElse nOpType = MCH_OY.MORTISING _
-                           OrElse nOpType = MCH_OY.SAWROUGHING OrElse nOpType = MCH_OY.SAWFINISHING Then
-                           EgtSetStatus(nOpId, GDB_ST.ON_)
+                        If IsValidMachiningType(EgtGetOperationType(nOpId)) Then
+                           EgtSetOperationStatus(nOpId, (EgtGetOperationPhase(nOpId) = nCurrPhase))
                         End If
                         nOpId = EgtGetNextOperation(nOpId)
                      End While
@@ -372,7 +367,6 @@ Namespace EgtCAM5
       Private m_cmdMoveUp As ICommand
       Private m_cmdMoveDown As ICommand
       Private m_cmdUpdate As ICommand
-      Private m_cmdReloadMachining As ICommand
 
       Sub New()
          Dim Temp As Integer = 0
@@ -713,69 +707,6 @@ Namespace EgtCAM5
 
 #End Region ' UpdateCommand
 
-#Region "ReloadMachiningCommand"
-
-      ''' <summary>
-      ''' Restituisce funzione per ricalcolo lavorazione.
-      ''' </summary>
-      Public ReadOnly Property ReloadMachiningCommand As ICommand
-         Get
-            If m_cmdReloadMachining Is Nothing Then
-               m_cmdReloadMachining = New RelayCommand(AddressOf ReloadMachining, AddressOf CanReloadMachining)
-            End If
-            Return m_cmdReloadMachining
-         End Get
-      End Property
-
-      ''' <summary>
-      ''' Ricalcola una lavorazione.
-      ''' </summary>
-      Public Sub ReloadMachining(ByVal param As Object)
-         ' Aggiorno valore depth
-         SelectedOperation.NotifyPropertyChanged("Depth")
-         ' Carico tutta la geometria selezionata in una lista
-         Dim SelectedGeometry As New List(Of Integer)
-         Dim EntityIndex As Integer = EgtGetFirstSelectedObj()
-         While EntityIndex <> GDB_ID.NULL
-            SelectedGeometry.Add(EntityIndex)
-            EntityIndex = EgtGetNextSelectedObj()
-         End While
-         ' Verifico se la geometria è cambiata, confrontando selezione attuale con geometria di lavorazione
-         Dim ModifiedGeometry As Boolean = False
-         Dim CountIndex As Integer = 0
-         EntityIndex = 0
-         Dim SubEntityIndex As Integer = 0     ' Sottocomponente, per ora non usato ma necessario
-         While EgtGetMachiningGeometry(CountIndex, EntityIndex, SubEntityIndex)
-            If SubEntityIndex = GDB_ID.NULL And CountIndex < SelectedGeometry.Count() Then
-               If SelectedGeometry(CountIndex) <> EntityIndex Then
-                  ModifiedGeometry = True
-                  Exit While
-               End If
-            Else
-               ModifiedGeometry = True
-               Exit While
-            End If
-            CountIndex += 1
-         End While
-         If SelectedGeometry.Count <> CountIndex Then
-            ModifiedGeometry = True
-         End If
-         ' Imposto geometria selezionata come geometria di lavorazione
-         If ModifiedGeometry Then EgtSetMachiningGeometry(SelectedGeometry.ToArray)
-         ' Se necessario ricalcolo la lavorazione
-         EgtApplyMachining(ModifiedGeometry)
-         EgtDraw()
-      End Sub
-
-      ''' <summary>
-      ''' Returns always true.
-      ''' </summary>
-      Private Function CanReloadMachining(ByVal param As Object) As Boolean
-         Return True
-      End Function
-
-#End Region ' ReloadMachiningCommand
-
 #End Region     ' Commands
 
 #Region "METHODS"
diff --git a/ProjectPage/OptionPanel/MachiningOptionPanel/OperationExpander/OperationListBoxItem/DispositionOpListBoxItem.vb b/ProjectPage/OptionPanel/MachiningOptionPanel/OperationExpander/OperationListBoxItem/DispositionOpListBoxItem.vb
index 6684db5..7600408 100644
--- a/ProjectPage/OptionPanel/MachiningOptionPanel/OperationExpander/OperationListBoxItem/DispositionOpListBoxItem.vb
+++ b/ProjectPage/OptionPanel/MachiningOptionPanel/OperationExpander/OperationListBoxItem/DispositionOpListBoxItem.vb
@@ -1,7 +1,7 @@
 Public Class DispositionOpListBoxItem
    Inherits OperationListBoxItem
 
-   Private m_Image As String
+   Private m_Image As String = String.Empty
    Public Property Image As String
       Get
          Return m_Image
diff --git a/ProjectPage/ProjectView.xaml b/ProjectPage/ProjectView.xaml
index 1ac5016..d5546d1 100644
--- a/ProjectPage/ProjectView.xaml
+++ b/ProjectPage/ProjectView.xaml
@@ -10,9 +10,6 @@
       <interactivity:EventTrigger EventName="Loaded">
          <interactivity:InvokeCommandAction Command="{Binding LoadedCommand}"/>
       </interactivity:EventTrigger>
-      <interactivity:EventTrigger EventName="Unloaded">
-         <interactivity:InvokeCommandAction Command="{Binding UnloadedCommand}"/>
-      </interactivity:EventTrigger>
    </interactivity:Interaction.Triggers>
 
    <EgtFloating:EgtFloatingManager>