I have a rather large assembly. When building the parts, I was sure to break all references. I renamed the original parts with assigned part numbers using the save as command which replaced the original part with the new one in the main assembly. Now, when I try to open the main assembly, it asks for parts that were under their original names but Solidworks can't find them (they were deleted). The parts that it can find get opened along the bottom of the screen in minimized state. What gives? How can I clean up my assembly? Any help would be greatly appreciated.