I have an assembly that is made up mostly of weldments with a couple of solids thrown in.  Some of the parts are made up of single body weldments and some are multi-body.  When I right click on the single body ones (in the Simulation Tree) I can “Treat as a Solid” but the multi-body ones don’t give me that option.  When you click on the plus (+) next to it, it shows the sub-components as solid bodies but it treats the whole as a beam (with joints and all).  Is there a way to treat all of the components as solids?  I know I can save the assembly as a part and all the bodies will separate but then I’ll have to spend the rest of the day defining contact sets.