Cannot reference WINMD: "neither .NET assembly not registered ActiveX component"

Question

I developed a WinRT component with C++/CX. It works with C#, JavaScript, and VB. When trying to add it as reference to a C++ Store App project I get an error:

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Microsoft Visual Studio
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Could not add a reference to file <NamespaceName>.winmd' because it is neither a .NET assembly nor a registered ActiveX control.
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OK  
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I verified both the Store app and the component are built in x64 Debug, what else do I do to troubleshoot?

Answer 1

Does this post help?
http://social.msdn.microsoft.com/Forums/windowsapps/en-US/d8700d07-5249-4a44-9862-8dc928884f4d/it-is-neither-a-net-assembly-or-registered-activex-control?forum=vclanguage

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Matt Small - Microsoft Escalation Engineer - Forum Moderator
If my reply answers your question, please mark this post as answered.

NOTE: If I ask for code, please provide something that I can drop directly into a project and run (including XAML), or an actual application project. I'm trying to help a lot of people, so I don't have time to figure out weird snippets with undefined objects and unknown namespaces.

Answer 2

Problem ended up disappearing after rebuild, no time to chase it up at the moment. If it starts reoccurring and I have to fix it, I will post the solution.

I changed configurations, built twice with different ones, then rebuilt (for anyone having similar issue).