I am new to Solid Edge, I have been using it for about 2 months. One of my projects required me to use the family of assemblies to show a drawer in the open and closed positions. I did this correctly to my knowledge, but today the drop down that let me choose the drawer position turned into a blank bar (shown with blue box around it). Also when I make certain changes (relationships and show/hide part) and save, the assembly doesn't keep them. When I look at the assembly in design manager it doesnt show any of the existing parts. I can still open the part through solid edge. I might have a corrupted file? Does anyone know how this might have happened and how to prevent it in the future? I included screen shots.