While creating object of excel in c#
var app = new Microsoft.Office.Interop.Excel.Application();
exception occurs as exception from hresult 0x800a03ec.
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pnuts
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user4278149
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Can you show the stack trace? This exception is usually generated when you are accessing an invalid cell. – Richard Schneider Feb 05 '15 at 05:16
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this is working in windows 2003 server but not in windows 2008 server with IIS7 – user4278149 Feb 05 '15 at 05:39
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Take a look at https://social.technet.microsoft.com/Forums/en-US/334c9f30-4e27-4904-9e71-abfc65975e23/problem-running-windows-service-with-excel-object-on-windows-server-2008-64-bit?forum=officesetupdeploylegacy – Richard Schneider Feb 05 '15 at 05:44
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possible duplicate of [Excel 2007 automation on top of a Windows Server 2008 x64](http://stackoverflow.com/questions/863864/excel-2007-automation-on-top-of-a-windows-server-2008-x64) – Richard Schneider Feb 05 '15 at 05:47
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Office version? Do you use the Click2Run edition of Microsoft Office? – Eugene Astafiev Feb 05 '15 at 08:16