Have you recently installed the "Roger" Battle droid model? If so, then that's what the problem is. I think deleting the Roger.pk3 should fix the problem. I hope the author releases another version, because that looked like a cool model!
EDIT: Sorry, got the error message mixed. The "roger" error says "Requested (um, something) was ommitted at compile time." If that is what the error says, that's the problem. IF not, I can't help you.
It's a squeaky little kitty!