How to restrain work pieces in the box

In attached model with PhysicsEntity, I want to put the workpieces in the box, but they go through the box. How do I get the them constrained in the box?

physics_fall_in_box.vcmx (455 KB)

When I open your Layout they land on top of your box. You have to change the physics entity of your box to #precise.



It worked fine when I fixed it.

Thank you.