--- a/Graphics/GraphicsUtilities.py Mon Mar 25 10:08:52 2013 +0100 +++ b/Graphics/GraphicsUtilities.py Mon Mar 25 10:24:44 2013 +0100 @@ -10,6 +10,7 @@ from __future__ import unicode_literals # __IGNORE_WARNING__ + class RecursionError(OverflowError, ValueError): """ Unable to calculate result because of recursive structure.