File does not exist

I have a user who tries to open up a solidworks model from Workgroup manager and he gets an error saying the part does not exist.  I can open the file myself, so the file is there and not corrupt.  He was able to open up files just a few weeks ago, but when he tries now, it doesn't work.  We are using Solidworks 2012 with 10.1 M040.

Thanks for any help or insight,

Ian Wexler

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