--- a/ProjectController.py	Mon Jan 16 01:14:57 2017 +0100
+++ b/ProjectController.py	Mon Jan 16 01:19:58 2017 +0100
@@ -1262,7 +1262,7 @@
     def _UpdateButtons(self):
         self.EnableMethod("_Clean", os.path.exists(self._getBuildPath()))
         self.ShowMethod("_showIECcode", os.path.isfile(self._getIECcodepath()))
-        if not self.UpdateMethodsFromPLCStatus():
+        if self.AppFrame is not None and not self.UpdateMethodsFromPLCStatus():
             self.AppFrame.RefreshStatusToolBar()
         
     def UpdateButtons(self):