Sorry, John.
This has progressed a wee bit. The problem is that the style names have become corrupt.
I did try your workbook, tho. It did nothing in 2003 (but no error) and threw the same error in 2000.
See: http://www.experts-exchange.com/Appl..._21356767.html
It's only marked Solved at EE 'cause I believe the issue is with the corrupt styles, not the code.