matplotlib crashing?

Hello, I am
running a wxpython application and I am using matplotlib to plot some data. It seems that when I plot a graph, then close
it and plot another graph my program crashes.
The error is “This application has requested the Runtime to terminate it in an
unusual way.

Please contact
the application’s support team for more information.”

Do I need to
close a graph in a special way before I open another one? Any
suggestions? Thanks.

Jeff

Jeff -- Post a small script that breaks and let us know versions
of python, matplotlib, and wxPython and which OS your using.

--Matt