I have an Excel Add-in connected to plant equipment on a machine running
Excel 2003.

When I open the spreadsheet with Excel 2003 on a machine that does NOT have
the add-in, the file opens with the last values recorded by the original
machine.

When I open the spreadsheet with Excel 2007 on a machine that does not have
the add-in, the file opens with #NAME? in all of the cells using the add-in
functions.

How can I make Ex2007 open the file and ignore the addin functions?

TIA
Donald