When I try to open up a step file containing multiple parts Solidworks is adding in three parts from my personal library which do not belong in the assembly. I know that these parts were not inserted by whomever generated the step file and am curious as to why they are being added. The C-frame case and plug floating above the assembly are the parts in question. The files are saved to a company server along with thousands of other parts. If I have someone else try to open the step file they do not encounter this issue.