I was working on an assembly and all of the sudden the body of a part in the assembly disappeared. I tried everything I could think of (updated the model, suppress/unsuppress, changed appearance....) but wasn't able to make to body to show. if I clicked on the part features in the tree it would show the highlight and would disappear as soon as I let go. Has anyone had the same problems and know how to fix this. Please let me know. thank you in advance.