I'm trying to perform stress analysis on a frame made up of universal beams. The frame is made up of multiple weldments in an assembly, and I'm trying to use bonded connections for the interaction between the beams. However when I select the faces of the beam to bond, I get an error: Invalid entity on beam body selected
I can't figure out why it won't allow the contacts. It also won't automatically find any contact sets. Help would be appreciated! I've attached the assembly file below.