@Bwian,

Well, my early onset dementia must have been kicking
in when I worked on the mounts part. Could you edit
animationutilities.py and on line 1094 could you comment
out the line like the following:

Code:
#        float_vec3.fromfile( fidcas, 7 )
using the pound sign "#". What the heck that is doing there
I have no idea. Anyway, it ran and produced a .cas file.
If your editor doesn't do line numbers, do a search for

Code:
def getcasfooter
to get to the function, then search for

Code:
fidcas
That should get you to the offending line.

Mea Culpa,

KE