Okay, what is it, and why does it occur on Win2003 server, but not on WinXP.
It doesn't seem to affect my application at all, but I get this error message when I close the application.  And it's annoying (as errors messages should be).
I am using pyOpenGl and wxPython to do the graphics stuff.  Unfortunately, I'm a C# programmer that has taken over this Python app, and I had to learn Python to do it.
I can supply code and version numbers etc, but I'm still learning the technical stuff, so any help would be appreciated.
Python 2.5, wxPython and pyOpenGL
After adding the Logging above, I was able to see that the problem was caused by missing TConstants class, which I was excluding in the py2exe setup.py file.  
After removing the "Tconstants" from the excluded list, I no longer had problems.
Python - No handlers could be found for logger "OpenGL.error"