Lost Save?

One of our engineers was working on a drawing (with a manager looking
over his shoulder) yesterday. He made revisions to it (according to the
engineer AND the manager), printed out copies and saved the file.
Today the file contained none of the changes he previously made.

Are there known issues that can cause this? I can't seem to find any
record of a virus program or the like (we're using McAfee VirusScan 9)
causing this problem. I also know that the virus program wasn't
scanning the file he was working on...so there shouldn't have been any
access conflict.

It's also kind of hard for a veteran engineer to just not save a
file...especially when AutoCAD notifies you if you're exiting a file
that hasn't been saved and the manager says he did save.

I've ruled out stupid human tricks such as someone else deleting those
changes, or someone restoring an older network backup copy of that file
etc.

Any suggestions? I can't point the finger at anyone/thing, and
engineers - rightfully so - don't like to hear "let's see if it happens
again."

Thanks

 

It's happened before that when someone thought they were saving to one place
on a computer,
that they were actually saving to somewhere else, even on a different
computer (in a network).
Depending on the operating system, a "recent documents" list might show more
than one version
of the same file being worked on.......

You could also do a file search with a "changed after" date parameter. It
would show all files
that have been revised.

 

Perhaps it's in a different directory??
R. Wink