If I recall correctly, it was something to do with animations being present from previous work. Even if the animations were then removed, the program would throw an error on compile. Copy the object if you can, and paste it in place of the original, then animate. Or, better, just recreate it. Or maybe use MCX to give the FSDS part a new GUID and see if that helps.Never had this problem before. for years. I just tried an old animation I did some time ago... I then recompiled... it worked fine. so- maybe I am forgetting something in doing ani!!! I sahll see.