Saved from a previous post:

XL: Error Message: Too Many Different Cell Formats
http://support.microsoft.com/default.aspx?scid=213904

And if you ever have trouble opening this file, you may want to try openOffice.

http://www.openoffice.org, a 60-65 meg download or a CD

A few people have posted that they could open the file in OpenOffice, then
remove some of the formatting, save it and then excel would open that file ok.

Saum wrote:

I have an Excel file with over 20 different worksheets that link to each
other, and most of their cells are formated. When I was formating one of the
worksheets I received the "Too many different cell formats" error, and from
that point, anytime I try to open the file I receive this same error message.
File recovery is not working, because it removes the formatting, and
formulas. Any suggestions?

Thanks

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Dave Peterson