There are two steps to resolve this issue.
Step 1
You must install the Excel 2007 hotfix�described in KB 973932 to prevent future Excel 97- 2003 workbooks from being damaged when they are opened or saved in Excel 2007.
973932�Description of the Excel 2007 hotfix package (Excel-x-none.msp, Xlconv-x-none.msp): August 25, 2009
To ensure you have properly installed the hotfix, perform the following steps.
1.���� Locate
Excel.exe and
Excelcnv.exe in your
\Program Files\Microsoft Office\12.0 folder.
2.���� Right-click on each file and select
Properties.
3.���� On the
Details tab, check the
Fileversion.
If the version of either file is before 12.0.6514.5002, you do not have the hotfix installed.
Step 2
If you have a damaged workbook, you will need to recreate the formulas using the Analysis Toolpak functions. Since the issue occurs when you save the file to a new name, you may be able to go back to the original workbook to obtain the proper formulas.