diff -r d3838e8f1b90 -r 84de51ab40d2 editors/Viewer.py
--- a/editors/Viewer.py	Fri May 10 15:17:33 2013 +0200
+++ b/editors/Viewer.py	Sun May 12 23:30:00 2013 +0200
@@ -3085,7 +3085,11 @@
             if blocktype is None:
                 blocktype = "Block"
             format = "%s%%d" % blocktype
-        return self.Controler.GenerateNewName(self.TagName, None, format, exclude, self.Debug)
+        return self.Controler.GenerateNewName(self.TagName, 
+                                              None, 
+                                              format, 
+                                              exclude=exclude, 
+                                              debug=self.Debug)
 
     def IsNamedElement(self, element):
         return isinstance(element, FBD_Block) and element.GetName() != "" or isinstance(element, SFC_Step)