On certain documents that have, previously, been known to
be good now give me the following message on any machine
I try and open them from.

"The document name or path is not valid. try these
suggestions 1)check file permissions 2)Use file open
dialog box."

The problem is sporadic and I can't find any pattern to
what could be causing this.  These users have been using
Office XP on 2000pro for approx. a year and now 3 cases
of this have appeared in a month.  They DO keep these
docs in Sourcesafe so my gut tells me that Sourcesafe
somehow may be the cause of this problem. Our environment
is strict so most computers are clean of unnecessary apps
and we do have antivirus. I tried opening them in safe
mode but could not. ANY suggestions would be appreciated.