i did notice a couple things. one i believe i fixed was that the sub-object had to have hit points to animate, i found this annoying since you might want to have a non-destructible animation object. you may have also needed to set an object speed (not sure about this one). and finally you had to edit your model and add +triggered: to the sub-object that you wanted to animate. that last one is easy to miss, not obvious at all, poorly documented, and worst of all, its not reported to the modder in the debug builds. if possible i think the requirement of the subobject property should be removed if it doesnt serve any major purpose.