Random exception in Tkinter callback, out of memory

Exception in Tkinter callback
Traceback (most recent call last):
  File "/usr/lib/python2.7/lib-tk/Tkinter.py", line 1550, in __call__  
    return self.func(*args)
  File "/usr/lib/python2.7/lib-tk/Tkinter.py", line 599, in callit
    func(*args)
  File "/usr/bin/axis", line 560, in actual_tkRedraw
    self.tkRedraw_perspective()
  File "/usr/bin/axis", line 520, in tkRedraw_perspective
    self.redraw_perspective()
  File "/usr/lib/python2.7/dist-packages/rs274/glcanon.py", line 352, in inner
    return f(self, *args, **kw)
  File "/usr/lib/python2.7/dist-packages/rs274/glcanon.py", line 599, in redraw_perspective
    glFlush()                               # Tidy up
error: (1285, 'out of memory')

When I run "top" in a terminal window, there is about 4GB free when it crashes.  Error report, ini and hal files attached.  Like I said, I'm new at this so feel free to point out if I've made poor choices in the configurations.

Thank you for any assistance you can provide.  I can't wait to get this running reliably and start configuring the rotary axis.

Ted