diff --git a/Aviso/frmWechselStandarddrucker.vb b/Aviso/frmWechselStandarddrucker.vb
index cadef2a..6df8e26 100644
--- a/Aviso/frmWechselStandarddrucker.vb
+++ b/Aviso/frmWechselStandarddrucker.vb
@@ -45,36 +45,39 @@ Public Class frmWechselStandarddrucker
     Private Function changetxtFileForPrinter(printerFile As String) As Boolean
 
         Dim changed As Boolean = False
+        Try
+            If File.Exists(printerFile) Then
+                Dim l = IO.File.ReadAllLines(printerFile, System.Text.Encoding.Default)
+                If l.Count > 0 Then
+                    If Not String.IsNullOrWhiteSpace(cboDefaultprinter._value) Then
+                        Dim lines As List(Of String) = IO.File.ReadAllLines(printerFile).ToList
+                        For index As Integer = 0 To lines.Count - 1
+                            If lines(index).ToLower.StartsWith("printer") Then
+                                lines(index) = String.Concat("PRINTER:", cboDefaultprinter._value)
+                                changed = True
+                            End If
+                        Next
+                        If changed Then IO.File.WriteAllLines(printerFile, lines.ToArray)
+                    End If
+
+                    If Not String.IsNullOrWhiteSpace(cboDefaultprinterBON._value) Then
+                        Dim lines As List(Of String) = IO.File.ReadAllLines(printerFile).ToList
+                        For index As Integer = 0 To lines.Count - 1
+                            If lines(index).ToLower.StartsWith("bon") Then
+                                lines(index) = String.Concat("BON:", cboDefaultprinterBON._value)
+                                changed = True
+                            End If
+                        Next
+                        If changed Then IO.File.WriteAllLines(printerFile, lines.ToArray)
+                    End If
 
-        If File.Exists(printerFile) Then
-            Dim l = IO.File.ReadAllLines(printerFile, System.Text.Encoding.Default)
-            If l.Count > 0 Then
-                If Not String.IsNullOrWhiteSpace(cboDefaultprinter._value) Then
-                    Dim lines As List(Of String) = IO.File.ReadAllLines(printerFile).ToList
-                    For index As Integer = 0 To lines.Count - 1
-                        If lines(index).ToLower.StartsWith("printer") Then
-                            lines(index) = String.Concat("PRINTER:", cboDefaultprinter._value)
-                            changed = True
-                        End If
-                    Next
-                    If changed Then IO.File.WriteAllLines(printerFile, lines.ToArray)
                 End If
-
-                If Not String.IsNullOrWhiteSpace(cboDefaultprinterBON._value) Then
-                    Dim lines As List(Of String) = IO.File.ReadAllLines(printerFile).ToList
-                    For index As Integer = 0 To lines.Count - 1
-                        If lines(index).ToLower.StartsWith("bon") Then
-                            lines(index) = String.Concat("BON:", cboDefaultprinterBON._value)
-                            changed = True
-                        End If
-                    Next
-                    If changed Then IO.File.WriteAllLines(printerFile, lines.ToArray)
-                End If
-
             End If
-        End If
 
-        Return changed
+            Return changed
+        Catch ex As Exception
+            MsgBox(ex.Message)
+        End Try
 
     End Function