Not sure if this makes a difference but we are using Enterprise PDM and Solidworks 2015 sp5.
Not sure if this makes a difference but we are using Enterprise PDM and Solidworks 2015 sp5.
It does make a difference. I would try.
Check out the part you want to be replaced.
Rename your new part to the old (outside) the vault.
Paste on your old file.
Now your assemblies will use your new part. After checkin you can change the name of your new part back to the new name if you want. What you might consider a downside, your old part will be gone and history will be in the "new" part..
Does the new part have the same name/number as the old part?
Was the old part used as the base model for the new part, or was the new part started from scratch?
How large are the assys? Can they all be opened at once, or maybe in just a few batches?