Problem: mattering objects to a unique file.

Hello, my problem is the following one, I am working in a game but several elements are in archives different from blender, so it has been necessary to concern those objects to a single main file, the mess this when the concerned object has applied dynamic, then east object becomes crazy and it does not work as it would have, the only solution until a now to be to do everything in a single file but that implies to me to repeat work already done, somebody knows because east problem occurs? Note: The problem leaves in all the versions blender. Any aid thanks. :smiley:

Sorry that I can help you. This is really interestion, I would like to know also.