HI I often meet this problem. The RBD Object accidently stopped after some frames in simulation. In this attached hip file , It stopped after 50 frame. I use H13.0376. What's the reason ? Thanks!
You can turn off “Enable Sleeping” on the RBD Object under the “Collisions/Bullet Data” tab. Otherwise, the solver tries to deactivate objects that are not moving or interacting with anything in order to improve performance.