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#2
11-24-2010, 11:41 PM
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This sounds like a case of Excel's Extension Hardening, which was introduced in version 2007. Does the error message say that the file is in a different format than specified by the extension?
Some more info on Extension Hardening and how to disable it can be found here: http://blogs.msdn.com/b/vsofficedeve...n-warning.aspx Hope this helps. -SW 
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Windows 7 
Office 2010 (Version 14.0)
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