I have been doing a lot of CAD over the summer, and have continually ran into the same issue. Solidworks (2018) will randomly give me a bunch of errors about missing mate references upon opening a document. The errors are usually with the imported bearing CAD from VEX, but will also extend to other imported files. I have never had an issue with a file I made. All that is required to fix it is to edit the mate and re-select the face/edge that is missing. Does anybody know how to fix this? It is really annoying to have to fix errors when I open a document.
This next picture also confuses me. I have always clicked “yes, replace all other missing mate references” but I have never noticed it actually change anything.