Exporting .nif collision animation

I can’t seem to export the animation for my collision mesh.
Plain animation for my models exports fine, but the collision object is something else.

ERROR
local variable ‘anim_textextra’ referenced before assignment Check console for possibly more details

Console:

UnboundLocalError: local variable 'anim_textextra' referenced before assignment.

My stuff:
Blender: 2.49b
Python 2.6.2
Blender NIF Scripts 2.4.10
PyFFI 2.0.2