I am trying to replace parts in an assembly and some work smoothly others are painful. The part templates are the same and modeled the same. I am using planes and face ID's. Orientation of the part comes in correctly but face coincident mates become "suppressed invalid or no longer exist". I have tried to scrap the face id's and insert planes because they are always there. Neither works. Still have broken mates. It would not be critical if I were simply just able to edit but I am in the process of a DriveWorks implementation and I would like to be able to automatically generate models without errors and having to edit. I also see that there is a Development group working on this issue. If anyone knows a better way to avoid these errors it would be greatly appreciated.