Unusual DLL error when installing AddIn
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?