A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
The root cause of your problem is the same as "Too many different formats" error. Answer is here: http://answers.microsoft.com/en-us/office/forum/office_2003-excel/too-many-different-cell-formats/5b2fdc26-ed5b-4459-8461-5d9d89ebe9a9. You must run your file backup (if you have one) through style cleaner process. I recommend my OOXML utility because it will remove inaccesible to VBA hidden corrupted styles or else you will end up in the same corrupted state really soon.