Formatting error message

[AndruH]

When trying to format a number for $, % or , I get an error message "Style ,
not found" - but the symbols are on the toolbar.

 

[Dave Peterson]

Start a new workbook.
Open the offending workbook.

With the offending workbook active, click on Format|Style
Click on the Merge button
Select the new workbook
and click ok

Since styles live in workbooks, you'll have to do this to every workbook that
lost its style.