I have been trying to figure out why my EPDM installation still chronically wastes part numbers, and I have come across a puzzling situation:

We have an assembly (at least one that I've found) which is the top assembly of our primary product and which is routinely replicated using Save As Copy.  When I try to do this Save As Copy, EPDM creates the copy, assigns it a new part number, then gives an error dialog which says:

Failed to add file to vault

An unspecified error occurred

or words very much to that effect.  If I locate the that is created and manually add it to the vault, it goes in fine, but the system then assigns yet another part number to it.  Now I have a replicated assembly that has a file name from the first part number it was issues, but the variable and data card field for part number shows the subsequent part number.  Here's an example:

Original file:

     filename:          123.sldasm

     P/N variable:     123

New file after Save As Copy but failed to add:

     filename:          456.sldasm

     P/N variable:     456

New file after manually adding to the vault:

     filename:          456.sldasm

     P/N variable:     457

So I'm curious to see if anyone knows:

1. Why would an otherwise perfectly normal assembly file consistently file to be added to the vault when doing a Save As Copy.  Parts don't have this problem and other assemblies I've tried also don't have this problem.
2. Why does the system assign one P/N when the file is created and a second one when it is added manually.  Note that if the file is added successfully during the initial Save As Copy operation, the add step doesn't issue a part number.  It only happens when I have to add the file manually.

Thanks for any helpful ideas or information.