I am working on an assembly with alot of parts.  I inserted a sub-assembly and for some reason it gives me a warning sign in the design tree.  I tried seeing whats wrong with it and it doesnt give me any errors, the dialogue box is empty.  I checked the parts in the sub assembly and the assembly itself and there are no problems.  I had an issue with an error giving me the same issue and while looking for the issue solidworks crashed and when i restarted the program the error was gone.  I tried closing and starting it back up, deleting the sub assembly, but no luck.  any idea how to either override or hide the warning?