It means that the workbook has too many different formats.
When I type "specs" into he Help search box I find (in Excel 2007)
Unique cell formats/cell styles 64,000

best wishes
--
Bernard V Liengme
Microsoft Excel MVP
http://people.stfx.ca/bliengme
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"kschad" wrote in message
...
I am trying to enter information into different cells on a spreadsheet. I
have not had any issues in the past, but all of a sudden I am receiving an
error message when I try to change the color of a row, or content in a
cell.
It says there are too many different cell formats.