I just found the Problem !

The solution would be a Pop Up to make users understand that something like this should not work, or should not be done.

Who the hell gets the Idea overwriting files that are in use anyway. try this with a Poser dll when it is running. or we could start to try overwriting Obj's while the figure is loaded, wonder what would happen. Would the figure change and keep the textures in real time, or just ignore it to prevent a crash ! and if a error pops up because we start replacing files that are in use start to spam tickets that the program is having an issue :)