diff --git a/Icarus/MainWindow/MainWindowM.vb b/Icarus/MainWindow/MainWindowM.vb
index f77bae9..e272251 100644
--- a/Icarus/MainWindow/MainWindowM.vb
+++ b/Icarus/MainWindow/MainWindowM.vb
@@ -195,8 +195,8 @@ Public Class MainWindowM
       ' Verifico abilitazione nesting automatico
       m_bAutoNestOption = Not String.IsNullOrWhiteSpace(sNestKey)
       ' Recupero livello e opzioni della chiave
-      Dim bKey As Boolean = EgtGetKeyLevel(5583, 2501, 1, m_nKeyLevel) And
-                            EgtGetKeyOptions(5583, 2501, 1, m_nKeyOptions)
+      Dim bKey As Boolean = EgtGetKeyLevel(5583, 2502, 1, m_nKeyLevel) And
+                            EgtGetKeyOptions(5583, 2502, 1, m_nKeyOptions)
       ' Inizializzazione generale di EgtInterface
       m_nDebug = GetMainPrivateProfileInt(S_GENERAL, K_DEBUG, 0)
       m_sLogFile = m_sTempDir & "\" & GENLOG_FILE_NAME.Replace("#", m_nInstance.ToString())
diff --git a/Icarus/My Project/AssemblyInfo.vb b/Icarus/My Project/AssemblyInfo.vb
index 9604f91..70eac1f 100644
--- a/Icarus/My Project/AssemblyInfo.vb	
+++ b/Icarus/My Project/AssemblyInfo.vb	
@@ -70,5 +70,5 @@ Imports System.Windows
 ' by using the '*' as shown below:
 ' <Assembly: AssemblyVersion("1.0.*")>
 
-<Assembly: AssemblyVersion("2.5.1.1")>
-<Assembly: AssemblyFileVersion("2.5.1.1")>
+<Assembly: AssemblyVersion("2.5.2.1")>
+<Assembly: AssemblyFileVersion("2.5.2.1")>
diff --git a/Icarus/SliceManager/SliceManagerVM.vb b/Icarus/SliceManager/SliceManagerVM.vb
index 4d27e9c..cd60feb 100644
--- a/Icarus/SliceManager/SliceManagerVM.vb
+++ b/Icarus/SliceManager/SliceManagerVM.vb
@@ -376,7 +376,8 @@ Public Class SliceManagerVM
          ' verifico esistenza e correttezza machgroup
          InitMachGroup(True)
          ' eseguo generazione CN
-         bOk = ExecGenerate()
+         Dim sMsg As String = ""
+         bOk = ExecGenerate(sMsg)
          ' leggo stima tempo e la riporto in layer di calcolo
          EgtGetInfo(EgtGetFirstMachGroup(), "Ttot", m_dTime)
          NotifyPropertyChanged(NameOf(ghTime))
@@ -391,7 +392,13 @@ Public Class SliceManagerVM
                nCurrPartId = EgtGetNextPart(nCurrPartId)
             End While
          Else
-            MessageBox.Show("Error in NC code generation! See log file.", "Error", MessageBoxButton.OK, MessageBoxImage.Error)
+            Dim sOut As String = "Error in NC code generation : "
+            If String.IsNullOrWhiteSpace(sMsg) Then
+               sOut &= "See log file."
+            Else
+               sOut &= sMsg
+            End If
+            MessageBox.Show(sOut, "Error", MessageBoxButton.OK, MessageBoxImage.Error)
          End If
       End If
       ' Aggiorno intestazione programma
diff --git a/Icarus/Utility/LuaExec.vb b/Icarus/Utility/LuaExec.vb
index 76cc0f3..59f41e2 100644
--- a/Icarus/Utility/LuaExec.vb
+++ b/Icarus/Utility/LuaExec.vb
@@ -64,7 +64,8 @@ Module LuaExec
       Return bOk
    End Function
 
-   Friend Function ExecGenerate() As Boolean
+   Friend Function ExecGenerate(ByRef sMsg As String) As Boolean
+      sMsg = ""
       EgtOutLog("-- Start ExecGenerate --")
       ' eseguo generazione
       EgtLuaCreateGlobTable("PRINT")
@@ -74,7 +75,7 @@ Module LuaExec
       Dim nTabPartId As Integer = EgtGetFirstNameInGroup(GDB_ID.ROOT, TABLE)
       If nTabPartId <> GDB_ID.NULL Then
          If Not EgtGetInfo(nTabPartId, KEY_ISOFILE_PATH, sIsoFilePath) OrElse
-            Not IO.Directory.Exists( IO.Path.GetDirectoryName(sIsoFilePath)) Then
+            Not IO.Directory.Exists(IO.Path.GetDirectoryName(sIsoFilePath)) Then
             EgtGetCurrFilePath(sIsoFilePath)
             Dim sExtension As String = ""
             GetPrivateProfileString(S_PARTPROGRAM, K_EXTENSION, "", sExtension, CurrentMachine.sMachIniFile)
@@ -89,6 +90,7 @@ Module LuaExec
       If bOk Then
          Dim nErr As Integer = 999
          EgtLuaGetGlobIntVar("PRINT.ERR", nErr)
+         EgtLuaGetGlobStringVar("PRINT.MSG", sMsg)
          bOk = (nErr <= 0)
       End If
       ' Cancello tavola globale