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Add-in loaded when Excel application is opened but not when double-clicking on an Excel file

Posted on 2011-09-08
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Last Modified: 2012-05-12
Hello,

I've developed an add-in for Microsoft Excel 2010 with Visual Studio 2010, and it works fine except on a single client computer, where the add-in is loaded when the user opens Excel, but not when he double click on an Excel file (we've tried with several extensions : csv, xls, xlsx).

Would you know how to fix this problem?
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Question by:JulienVan
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Raheman M. Abdul earned 500 total points
ID: 36501636
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by:JulienVan
ID: 36501705
Hi marahman3001, thanks for your reply and this link.
Unfortunately it doesn't help because :
 - The add-in seems correctly loaded in the Excel add-in options
 - There are no other COM add-ins
 - The option "Ignore other applications that Use Dynamic Data Exchange (DDE)" is not checked in Excel
 - There are no error in the Windows events log

Would you have any other ideas?
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by:JulienVan
ID: 36501713
I haven't checked the proposed solution related to the registry, I'm going to take a look at it.
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by:JulienVan
ID: 36501804
Hi, the solution was simple, the user has both Excel 2007 and 2010 versions installed, and the 2007 was installed after the 2010, so when he double clicked on an excel file, it was opened by Excel 2007, whereas the add-in was installed for Office 2010. Thanks for your help, I'm closing the question.
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