When you open any existing file using File|open within excel, you get that error
message?

And if you click on the new icon on the standard toolbar, you get it again?

Or do you get that message when you start up excel?



Daisy1 wrote:

When I attempt to open any excel files a error pops up stating file format
invalid. It also happens when I attept to open a new excel sheet???? I have
excel student teacher edition 2003

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Dave Peterson