gcc-4.2 failed with exit code 1

Command /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc-4.2 failed with exit code 1

Duplicate symbol _OBJC_IVAR_$_SongList.MyTableRecs in /Avneesh_iphone/MusicPlayer Final/US Top 100/build/iphonePlayer.build/Debug-iphonesimulator/USTop100.build/Objects-normal/i386/SongList.o and /Avneesh_iphone/MusicPlayer Final/US Top 100/build/iphonePlayer.build/Debug-iphonesimulator/USTop100.build/Objects-normal/i386/Junk.o

SOLUTION:

This error comes due to implementation of same name class in two files :)