So I've come across the same issue that I've constantly run into for as long as I've been using SW: over-defined assemblies that seemingly shouldn't be over defined...
In the attached assembly, I'm trying to center "Bottom Piece_Leg" directly under "Length_Leg" (and they have exactly equal cross sections!). Before adding "Coincident 4", the bottom piece was free to move in one dimension relative to the length piece. It seems like adding a coincident mate to the appropriate flat faces would do the trick...however, while it does constrain the movement as intended, it also gives me a host of error warnings (as seen in the attached assembly). Anyone have any knowledge in this area?
Any and all help is appreciated !
Thanks in advance,