Hello,
In the attached there are two slider pot. The bottom part seems to have a problem. Whenever I slide the bottom part directly under the part, then save/rebuild, the part disappears. When I slide just half of the bottom part under the slider part and rebuild, half of the bottom part disappears. I think it's a cutting problem but there are so many relations that if I delete it, it causes more errors. How should I go about this?
You have the Cut-Extrude6 in the assembly which I am assuming was to cut the slot in the top piece. But you have it cutting both pieces. Edit the feature and delete the bottom piece from the feature scope.