@Anonymous
When posting and sharing files always indicated the Inventor version you're using or what version was used when last saved. In your case its Inventor 2019.. So let me ask you this question since there's a lot of files and not really in a spot to extract all these files to my hard drive to review your model. If you are having a programming issue then you need to use the Inventor customization forum https://forums.autodesk.com/t5/inventor-customization/bd-p/120 but if this is actually just an appearance issue between the appearance at the part level and assembly, then you need to tell us which one parts are impacted.
Update: Is this school related work? Are you following something and its not working. However I noticed the files were originally created in Inventor 2012 and thus my reason I'm asking these additional questions.
Update #2: And what do you meaning "we are having an issue"?
Mark Lancaster
& Autodesk Services MarketPlace Provider
Autodesk Inventor Certified Professional & not an Autodesk Employee
Likes is much appreciated if the information I have shared is helpful to you and/or others
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