Where is she saving the file? Network or local harddrive?
If it's the network, then ask her to try saving it to the harddrive--maybe it's
a permissions thing (or even network hardware error???).
If it's the local harddrive, maybe she's on a partition that's full????
If it's a removeable media, tell her to stop doing that forever! Use the
hardrive/LAN and then use windows explorer to copy to that location.
And if I recall correctly, Windows XP has some permission settings, too. Maybe
she doesn't have access to that location????
Just guesses...
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After you've eliminated all that, can she save any (similar sized) workbook to
that location? If yes, then maybe it's a macro created by the developer. And
that developer doesn't want the workbook saved.
She could try opening excel in safe mode:
Close excel
windows start button|Run
Excel /safe
And then open the file and see if she can save it.
If she can, maybe she shouldn't <bg>.