Simulation failure

Hi there,

I have a problem with my simulation.

Situation: The upper metal part (where a hook goes trough) is attached to a metal part which stays in position because of the attachment underneath the base plate. (see attachements)

Problem: The simulation won't run without errors and when it runs it doesn't give the desired result.

What I already did:

- Fixture underneath the base plate.

- Defined force on upper part.

- Contact set on base plate and the H-shaped part

- Weldment on the H-shaped part and the part above.

Question: How do I mate/contact set the flat face to the round face on both parts so that the parts stick together (attachement 5)?

Thanks in advance!

Nigel

SolidworksSimulation