suppression

Hi, I'm having the following problem. If I suppress a working in a part instead of becoming gray in the design explorer it disappears completely and I can reinsert it only if I do Undo. Does this happen to you too or am I missing something?

I have an assembly which I am controlling with a global parameter file. The assembly is somewhat complicated in that there are about a dozen or more different add-ons that can be added, like different adaptor plates, handles, and extra parts, etc. Is there a way to use the global parameter file...