Undefined symbols for architecture i386: "RKLogCoreDataError"

Good Morning, whenever I'm trying to build my application, in the step of Linking happens the error of Undefined symbols for architecture

Follows the error in more detail:

Undefined symbols for architecture i386: "_RKLogCoreDataError", referenced from: ___33-[RKEntityByAttributeCache load:] _block_invoke in libRestKit.a (RKEntityByAttributeCache.we) ___43-[RKManagedObjectImporter finishImporting:] _block_invoke in libRestKit.a (RKManagedObjectImporter.we) ld: symbol (s) not found for architecture i386 clang: error: linker command failed with exit code 1 (use-v to see invocation)

Have you been through any similar situation?

I'm using Xcode 6.4 (6E35b)