Millipede modeling issues

Hey all,
I’m trying to do some analysis of the torsional forces in backcountry skis and I’m having trouble getting my FE solver to run (using millipede). I’ve refenced extrusions and polysurfaces as breps for the boundary/load/support regions but the solver chokes and I’m not sure why. Attached are my files.

As a background, I’m not an engineer, just an architecture student who likes to tinker, but I’m really interested in learning as much of the nitty-gritty of how all these systems and programs are working, so any background or references are always appreciated.

thanks in advance,
Josh (16.8 KB)
stubbyfea.3dm (5.4 MB)