Building Problem

FROM : Neto
DATE : Sun Jun 04 07:56:12 2006

I'm trying to build my application using the release configuration 
after many successful build at the debug configuration, but I'm 
getting an error:

/usr/bin/ld: multiple definitions of 
symbol .objc_class_name_AppController
/Users/neto/Documents/Jobs/Objective C/GXP2/build/GXP2.build/Release/
GXP2.build/Objects-normal/ppc/AppController-C2D8066B.o definition of 
absolute .objc_class_name_AppController (value 0x0)
/Users/neto/Documents/Jobs/Objective C/GXP2/build/GXP2.build/Release/
GXP2.build/Objects-normal/ppc/AppController-C2D8066B.o definition of 
absolute .objc_class_name_AppController (value 0x0)
collect2: ld returned 1 exit status


Anyone can help?