Starguy,

just another thought

can you compress your file, zip it?

I did a search on Microsoft's website and there seems to be alot of
information about the error message you are receiving...

This file is huge and it must take a long time to open and close, save
etc.. etc..
can you trim it down at all?

I use Excel Version 2002 and I have never seen this message

I am surprised nobody else has responded.

Good Luck..

Thanks,
ExcelUser777