Some info:

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

I'd remove some of the formatting. (maybe format per column??)

If it gets too bad, you may not be able to reopen your workbook. If that
happens, then 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

Microsoft wrote:

Dear All

I have a quite big excel and i am trying to make some changes in format and
i receive the message "Too many different cell format"

Probably i have many different cell formats.
From where i can set up the format in order to know what must be the format
of the excel file?
I need away to identify the format from all sheets in order to give to the
all sheets as common format as i can.
Any ideas?

--

Dave Peterson