I have an assembly file with two configurations. All of the parts are the same in both configurations except for one part which is just a different part configuration. I have suppressed all of the mates in the first configuration in my second configuration. As soon as I apply a mate in the second configuration and make sure that mate is suppressed in the first configuration, all of the mates in the first configuration fail to solve. Why is this happening? It is very annoying to work with different configurations in an assembly file with SolidWorks. Has anyone had a similar issue?