diff --git a/Icarus/Constants/ConstIni.vb b/Icarus/Constants/ConstIni.vb
index 93ec491..1aed02d 100644
--- a/Icarus/Constants/ConstIni.vb
+++ b/Icarus/Constants/ConstIni.vb
@@ -85,7 +85,7 @@ Public Module ConstIni
    Public Const K_CUSTOMCOLORS As String = "CustomColors"
 
    'Public Const S_GRID As String = "Grid"
-   Public Const K_SHOWGRID As String = "ShowGrid"
+   'Public Const K_SHOWGRID As String = "ShowGrid"
    'Public Const K_SHOWFRAME As String = "ShowFrame"
    'Public Const K_SNAPSTEP As String = "SnapStep"
    'Public Const K_SNAPSTEPINCH As String = "SnapStepInch"
diff --git a/Icarus/MainWindow/MainWindowVM.vb b/Icarus/MainWindow/MainWindowVM.vb
index e7afcbe..c0e9847 100644
--- a/Icarus/MainWindow/MainWindowVM.vb
+++ b/Icarus/MainWindow/MainWindowVM.vb
@@ -287,9 +287,9 @@ Public Class MainWindowVM
       ' salvo modo di visualizzazione
       WriteMainPrivateProfileString(S_SCENE, K_SHOWMODE, EgtGetShowMode().ToString())
       ' Salvo stato visualizzazione direzione curve
-      WriteMainPrivateProfileString(S_SCENE, K_CURVEDIR, If(EgtGetShowCurveDirection(), 1, 0).ToString())
+      WriteMainPrivateProfileString(S_SCENE, K_CURVEDIR, If(EgtGetShowCurveDirection(), "1", "0"))
       ' Salvo stato visualizzazione griglia
-      WriteMainPrivateProfileString(S_GRID, K_SHOWGRID, If(Map.refMyStatusBarVM.bGridVisibility, 1, 0).ToString())
+      WriteMainPrivateProfileString(S_GRID, K_SHOWGRID, If(Map.refMyStatusBarVM.bGridVisibility, "1", "0"))
       ' Termino il Model
       m_MainWindowM.Close()
       ' Termino il programma
diff --git a/Icarus/SceneHost/MySceneHostVM.vb b/Icarus/SceneHost/MySceneHostVM.vb
index 7c8e5b2..309ac0b 100644
--- a/Icarus/SceneHost/MySceneHostVM.vb
+++ b/Icarus/SceneHost/MySceneHostVM.vb
@@ -193,7 +193,7 @@ Public Class MySceneHostVM
       ' imposto visualizzazione riferimento globale
       EgtSetGlobFrameShow(True)
       ' imposto i dati della griglia
-      Dim bGridVisibility As Boolean = GetMainPrivateProfileInt(S_GRID, K_SHOWGRID, 1) <> 0
+      Dim bGridVisibility As Boolean = (GetMainPrivateProfileInt(S_GRID, K_SHOWGRID, 1) <> 0)
       Dim dSnapStepMm As Double = GetMainPrivateProfileDouble(S_GRID, K_SNAPSTEP, 10)
       Dim dSnapStepInch As Double = GetMainPrivateProfileDouble(S_GRID, K_SNAPSTEPINCH, 10)
       Dim nMinLineSStep As Integer = GetMainPrivateProfileInt(S_GRID, K_MINLINESSTEP, 1)
@@ -214,10 +214,10 @@ Public Class MySceneHostVM
       ' imposto tipo coordinate
       MainScene.SetGridCursorPos(True)
       ' visualizzazione avanzata dei triangoli costituenti le superfici
-      Dim bShowTriaAdv As Boolean = GetMainPrivateProfileInt(S_SCENE, K_SHOWTRIAADV, 1) <> 0
+      Dim bShowTriaAdv As Boolean = (GetMainPrivateProfileInt(S_SCENE, K_SHOWTRIAADV, 1) <> 0)
       EgtSetShowTriaAdv(bShowTriaAdv)
       ' visualizzazione direzione curve
-      Dim bShowCurveDirection As Boolean = GetMainPrivateProfileInt(S_SCENE, K_CURVEDIR, 0) <> 0
+      Dim bShowCurveDirection As Boolean = (GetMainPrivateProfileInt(S_SCENE, K_CURVEDIR, 0) <> 0)
       EgtSetShowCurveDirection(bShowCurveDirection)
       ' tipo visualizzazione per Zmap
       Dim nShowZmap As Integer = GetMainPrivateProfileInt(S_SCENE, K_SHOWZMAP, 1)
@@ -843,11 +843,16 @@ Public Class MySceneHostVM
       If Not bOk Then
          MessageBox.Show(Application.Current.MainWindow, EgtMsg(10002), EgtMsg(10001), MessageBoxButton.OK, MessageBoxImage.Error)  ' Error on new file  - Error
       End If
+
       Map.refTopPanelVM.PartList.Clear()
       Map.refTopPanelVM.SetSelModifyMode(ModifyModes.NULL)
       Map.refSliceManagerVM.UpdateTimeAndMass()
       Map.refSliderManagerVM.RefreshSlider(0, 0)
       Map.refSliderManagerVM.SetLayerIndexToMax()
+
+      ' resetto calcolo solidi
+      Map.refViewLayerManagerVM.ResetSolid()
+
       EgtZoom(ZM.ALL)
       MainScene.SetStatusNull()
    End Sub
diff --git a/Icarus/SecondaryWindow/SecondaryWindowVM.vb b/Icarus/SecondaryWindow/SecondaryWindowVM.vb
index 500a4cb..6e030cf 100644
--- a/Icarus/SecondaryWindow/SecondaryWindowVM.vb
+++ b/Icarus/SecondaryWindow/SecondaryWindowVM.vb
@@ -83,10 +83,10 @@ Public Class SecondaryWindowVM
    End Sub
 
    Private Sub SplashScreenTimer_Tick()
-      If m_WaitAfterRender > 2 Then
+      If m_WaitAfterRender > 1 Then
          ' chiudo SplashScreen
          Map.refSplashScreen.Close()
-      ElseIf m_WaitAfterRender >= 1 Then
+      ElseIf m_WaitAfterRender > 0 Then
          m_WaitAfterRender += 1
       End If
    End Sub
diff --git a/Icarus/StatusBar/MyStatusBarVM.vb b/Icarus/StatusBar/MyStatusBarVM.vb
index ebaf89e..8262818 100644
--- a/Icarus/StatusBar/MyStatusBarVM.vb
+++ b/Icarus/StatusBar/MyStatusBarVM.vb
@@ -51,8 +51,8 @@ Public Class MyStatusBarVM
       ' modo di visualizzazione
       Dim nShowMode As Integer = GetMainPrivateProfileInt(S_SCENE, K_SHOWMODE, SM.SHADING)
       Map.refShowPanelVM.SetShowMode(DirectCast(nShowMode, SM))
-      ' visualizzazione avanzata dei triangoli costituenti le superfici
-      Map.refShowPanelVM.CurveDirIsChecked = EgtGetShowTriaAdv()
+      ' visualizzazione freccia direzione su curve
+      Map.refShowPanelVM.CurveDirIsChecked = EgtGetShowCurveDirection()
    End Sub
 
    Friend Overloads Sub SetSnapPointType(sSnapPntType As SP)
diff --git a/Icarus/ViewLayerManager/ViewLayerManagerVM.vb b/Icarus/ViewLayerManager/ViewLayerManagerVM.vb
index 9670c19..edde313 100644
--- a/Icarus/ViewLayerManager/ViewLayerManagerVM.vb
+++ b/Icarus/ViewLayerManager/ViewLayerManagerVM.vb
@@ -52,9 +52,12 @@ Public Class ViewLayerManagerVM
       If Not IsNothing(ViewLayerSolid) Then
          ViewLayerSolid.bIsVisible = False
          If Map.refTopPanelVM.SelPage = Pages.MODIFY Then
-            WriteMainPrivateProfileString(S_VIEWLAYER, K_SLC_SOLIDSLICE, 0)
+            WriteMainPrivateProfileString(S_VIEWLAYER, K_SLC_SOLIDSLICE, "0")
          ElseIf Map.refTopPanelVM.SelPage = Pages.SLICE Then
-            WriteMainPrivateProfileString(S_VIEWLAYER, K_MOD_SOLIDSLICE, 0)
+            WriteMainPrivateProfileString(S_VIEWLAYER, K_MOD_SOLIDSLICE, "0")
+         ElseIf Map.refTopPanelVM.SelPage = Pages.NULL then
+            WriteMainPrivateProfileString(S_VIEWLAYER, K_MOD_SOLIDSLICE, "0")
+            WriteMainPrivateProfileString(S_VIEWLAYER, K_SLC_SOLIDSLICE, "0")
          End If
       End If
    End Sub