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Unusual DLL error when installing AddIn

Accepted answer
edited Oct 29, 2011 4:54PM in UI Extensibility 8 comments


I have an AddIn which includes several DLLs. It works fine in Developer Mode. When I ZIP it and go to install it using AddIn Manager, I get this error message:

"The only DLL in the ZIP file that can contain add-ins is OmInteractionClient.DLL. BalloonWindow.dll is invalid because it also contains add-ins."

However, BalloonWindow.dll is a third party control which has no reference to AddIns whatsoever. Any ideas for how to troubleshoot this?

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