Mythico:

I couldn't replicate your errors with animated simulations on either of my systems (WinXP_x86/Win7_x64). I tried both simple, and a complex animation simulation that ran for over 4 hours. I was able to use all selection parameters, including material selections without errors at the end of simulations, and both individual poses and full animations returned to host (DS) without issues.

Please add more details (environment, meshes used, etc.), so VirtualWorldDynamics, and/or Philemot can try to help you better.