可能重复：
Command /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc-4.2 failed with exit code 1
嗨，我在我的应用程序的最后阶段它工作正常，但突然它开始显示以下错误
ld: duplicate symbol _OBJC_METACLASS_$_ABC in /Users/Rachit/mobileapps/iphone/MYCOMPApp copy/build/MYCOMPApp.build/App Store Distribution-iphoneos/MYAPP.build/Objects-normal/armv6/ABC-B9CA0037BD5C5F44.o and /Users/Rachit/mobileapps/iphone/MYCOMPApp copy/build/MYCOMPApp.build/App Store Distribution-iphoneos/MYAPP.build/Objects-normal/armv6/ABC-B9CA0037BD5C5F44.o
Command /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc-4.2 failed with exit code 1
有没有人知道到底发生了什么事（有一刻它工作得很好，而另一时候这个错误就在那里）。