I've dug around and couldn't find this issue addressed anywhere.

I've got a weldment that I can simulate just fine when using only the Beams and excluding the Plates. However when I add the plates I get an unstable error. The Plates are set to solid bodies and I've attempted several contact sets, but nothing seems to stabilize the model. I'm wondering if the gussets are touching the Beams or if there is a ever so slight gap?

Has anyone experienced this issue? If so what did you do to solve it?

Attached is the model with the simulation set up.

Thanks in advance,