diff --git a/My Project/AssemblyInfo.vb b/My Project/AssemblyInfo.vb
index 69e4229..e345a55 100644
--- a/My Project/AssemblyInfo.vb	
+++ b/My Project/AssemblyInfo.vb	
@@ -70,5 +70,5 @@ Imports System.Windows
 ' by using the '*' as shown below:
 ' <Assembly: AssemblyVersion("1.0.*")> 
 
-<Assembly: AssemblyVersion("2.2.2.1")> 
-<Assembly: AssemblyFileVersion("2.2.2.1")> 
+<Assembly: AssemblyVersion("2.2.2.2")> 
+<Assembly: AssemblyFileVersion("2.2.2.2")> 
diff --git a/OptionPanel/MachiningOptionPanel/SimulationExpander/SimulationExpanderViewModel.vb b/OptionPanel/MachiningOptionPanel/SimulationExpander/SimulationExpanderViewModel.vb
index 7a94e8d..fa37806 100644
--- a/OptionPanel/MachiningOptionPanel/SimulationExpander/SimulationExpanderViewModel.vb
+++ b/OptionPanel/MachiningOptionPanel/SimulationExpander/SimulationExpanderViewModel.vb
@@ -739,7 +739,14 @@ Public Class SimulationExpanderVM
       Application.Msn.NotifyColleagues(Application.OPERATIONVIEWEXPANDERISENABLED, False)
       Application.Msn.NotifyColleagues(Application.MACHGROUPSISENABLED, False)
       OnPropertyChanged("Estimation_IsEnabled")
-      EgtSimStart(False)
+      If Not EgtSimStart(False) Then
+         If EgtGetLastMachMgrErrorId() <> 0 Then
+            Dim sErr As String = EgtGetLastMachMgrErrorString()
+            MessageBox.Show(sErr, EgtMsg(MSG_SIMULATION + 5), MessageBoxButton.OK, MessageBoxImage.Exclamation)                     '.... - ERRORE
+         Else
+            MessageBox.Show(EgtMsg(MSG_MESSAGEBOX + 10), EgtMsg(MSG_SIMULATION + 5), MessageBoxButton.OK, MessageBoxImage.Error)    'Errore sconosciuto - ERRORE
+         End If
+      End If
       Dim nShowDataCounter As Integer = 0
       While m_nStatus <> MCH_SIM_ST.UI_STOP
          ' Se simulazione in svolgimento