Save it as an Excel file (XLSX)...

You get the warning if you continue to save it in XLS format (Excel 2003)
and it contains some features which are only available in 2007.

"Barb Cary" wrote:

Document was originally created in Excel 2003. Basic file with a few
forumlas. When we save in 2007 we get an MS error "loss of fidelity"

Any ideas?