What ended up being the problem? I'm getting a similar error with gibs and haven't the slightest clue why it rejects the gib.
What happened was.. I brought it into the game, placed it with the gib editor, saved it out after placing it nicely. Then, I used the newdata ini's vector offset outputs (rounded to the nearest tenth) into the main ini of the object. Now it's saying,
Uhh so yeah, I've gone back and checked my spelling and if there's anything odd stated in the MOSRotating class but it all looks legit, and if I revert to before the vector change it's fine.....
Edit: Oh duhh.. PresetName = instead of CopyOf =
=.= nvm