We have the pdmw vault from a company we recently acquired. I just made a change to one of the parts in the vault with no problem.
Now I have been asked to change the part number of the part. Before proceeding I used pdmw workgroup to do a "where-used" for the part so I had an idea of the ramifications would be of changing a part number. It did not return any places that the part was used in. However, if I go to one of the other top assemblies in which the part is used there is an icon showing that it "resides in another project but is referenced by this project".
Why won't these upper assemblies show in the part's "where-used" tab?
Also, if you look at the References tab for one of those assemblies and double click on the part in question, it will pull it up in the Doc Info dialog. Then click on the Where Used and you should see at least the assembly you just came from.
Hope this helps.