Some info:

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

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.

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

MARLOLA wrote:

pLEASE URGENT! I WAS COPYING A SHEET TO ANOTHER FILE AND AFTER THAT THE LAST
ONE DONNA OPEN "BECAUSE OF TOO MANY DIFFERENT CELLS". HOW CAN I RESTORE THE
DAMAGED FILE?

--

Dave Peterson