Unity Xcode undefined symbols for armv7

Hello,

I have been working on a project using Unity 5.2.1 and Xcode 7.1, and when I try to build it for iOS, I receive some error message from Xcode. Unity shows a "Build Success" alert, but when Xcode try to build the project it fails, showing this:

I have also try to build it for iPhone and iPad separately and appears the same errors. It looks like the errors came from "RegisterMonoModules()" but I do not know how to fix them. If anybody knows why this appears I will be really appreciated.

Thanks