I have made a sub assembly that will eventually be one of six running at different times. Everything was going fine until I tried to recalculate my motion study (basic motion), which caused everything to stop moving. I'm not sure where the error is, since it runs fine until you click calculate. You will notice a mate plane error, but even when that is corrected, recalculating stops all motion. I am using SW '12. Hopefully you guys can see what I don't!