[Matplotlib-users] anim_tk.py doesn't run

[Gary <pa...@in...>]

Returning after a time to my animation project.

The first thing i did was to make sure anim_tk.py still runs.  It 
didn't.  A ghost figure window appears, and there is a long stall, then 
the message:

elapsed 10.7956385487
Fatal Python error: PyEval_RestoreThread: NULL tstate

This application has requested the Runtime to terminate it in an unusual 
way.
Please contact the application's support team for more information.

Is it me, or did something break?
WinXP,  matplotlib 0.64, recently installed by deleting the existing 
matplolib directory and installing using the windows installer.  
Examples installed from the latest zip.

thanks,
gary