Hi guys. I am a new learner and really need help for my university project. It is a lifting sytem. The problem is, i try to do finite element analysis(stress tensor,deformation) using simulation Xpress. I try to do fea on the platform pin at several point along the path of the frame under certain load. However, i cant proceed because it say it not support assembly part. If i save as the assembly into part, it say it has no solid body. Also do the mating influence the result of analysis? and will anyone teach me how to do analysis. Any idea, help? Is it posible with my design? i attach the zip file for review. Thanks!