Did you forget prefcolor?
As for the segment error, you probably have ended up with the lowercase a and b frames becoming uppercase (which would make them A and B), which are already used for the standing and first waiting frames. The lowercase a frame is the second frame for the falling frame, so if that frame was accidentally left uppercase instead of lowercase (I mean A instead of a), then it would sigsev everytime you would normally see the falling animation in-game.
Hope this helps.