I am working thru the same thing, scheduled for training next month, so I am just trying to work thru some things on my own.
have not gotten assembly to work yet.
I'm surprised that no one already answered you guys.
The answer is really simple - SW Plastics does not support assembly files...
Instead, you will have to build a Multibody part and work that way.
that is what I found also, just never got around to posting after I found out.
We went thru the official training with our VAR a couple weeks ago & had a lot of questions answered there.
Thank you all. The easiest way I found out how to do this is to create an assembly then SAVE AS a .sldprt (part file). Then you can run an analysis on that assembly part file.