See the MSKB article at
http://support.microsoft.com/default...85&Product=xlw

Ed

"Sipoftea " wrote in message
...
We are experiencing the same issue with some files that we have
digitally signed. The Marco code performs a lot of calculations then at
the end copy data a new tab. Although the macro does not change, we get
"You have modified a signed project. You do not have the correct key to
sign this project. The signature will be discarded". This occurs
regardless of the fact that the tab has a macro on it or not.

Is this a bug in Excel? I think we should be able to copy tabs in Excel
without breaking the signature....


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