XCode 4 Error about missing documentation from doxygen.app / Core-Plot

I recently upgraded to XCode 4. I imported a project from 3.2 and started a build. I got two errors immediately, regarding missing documentation. The project built successfully regardless, but I'd like to remedy the issue.

I compile with the core-plot framework, and the error is specific to some missing files in doxygen.app. After some Googling I've discovered tha开发者_StackOverflow社区t this is some sort of documentation engine.

Is there a way I cam either make XCode ignore the error (and not display it) or get the missing documentation so it stops bugging me?

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