I have a a problem with an assembly file which has always worked: when I open it I can see everything, but a few seconds later a window appears and apparently some data cannot be found and a few seconds later all the components are gone because they are suppressed. I can still see them on the left side, so i tried to unsuppress them, but it doesn't work. The same thing happened to two files. Does anyone have any advice?
I would try a couple ways to deal with:
1. Open a both files first, and then assembly.
2. If it not helped, delete from assembly both and insert again.