duplicate symbol _OBJC_METACLASS_$_ClassName

Question

I am trying to run my cocos2d application and facing this error, as I have recently upgraded my sdk to 4.2 and my cocos2d to 0.99.5.

I tried to clean my project even

Answer 1

A stupid mistake that I made was that I named my @implementation the same as my superclass.

In the .h

@interface Subclass : Superclass
@end

In the .m

#import "Subclass.h"

@implementation Superclass
@end

None of the regular suggestions from google seemed to help, so if someone is as crazy or tired as I am (maybe a healthy mix of both), make sure you haven't duplicated an @implementation!