I think I found some of the error. I copied one character as "Save as" in the same folder. When the other copies/instances, what ever, share the same .dyn files, there is something messing up the simulation so it bounces off.

I took the other files in their own folder, opened it, cleared the simulation, and made a new simulation, where it wrote new .dyn files in that folder.

But, I have this nightmare with textures that are applied in Poser. I always have to find them when I load Poser file in C4. I get both dialog to find them manually and C4 dialog that says it can't locate... file.

I have upgraded my system harddrive and I could just copy my backup Poser app. and it worked. Could this have something to do with it?
I will reinstall it now anyway. A bug on the machine is a bug on my brain.