Apple Push notification Problem gcc-4.2 failed with exit code 1

I almost done my app but suddenly an error appear

The ERROR:

    Ld build/urbantest.build/Release-iphoneos/urbantest.build/Objects-normal/armv7/urbantest normal armv7
cd /Users/mbp/Apps/Testing/urbantest
setenv IPHONEOS_DEPLOYMENT_TARGET 4.1
setenv PATH "/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc-4.2 -arch armv7 -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.1.sdk -L/Users/mbp/Apps/Testing/urbantest/build/Release-iphoneos -L/Users/mbp/Apps/Testing/urbantest/Airship -F/Users/mbp/Apps/Testing/urbantest/build/Release-iphoneos -filelist /Users/mbp/Apps/Testing/urbantest/build/urbantest.build/Release-iphoneos/urbantest.build/Objects-normal/armv7/urbantest.LinkFileList -dead_strip -all_load -weak_library /usr/lib/libSystem.B.dylib -miphoneos-version-min=4.1 -framework Foundation -framework UIKit -framework CoreGraphics -lUAirship-1.0.4 -framework AudioToolbox -framework MessageUI -framework CFNetwork -framework CoreTelephony -framework MobileCoreServices -framework Security -framework StoreKit -framework SystemConfiguration -lsqlite3 -lz -o /Users/mbp/Apps/Testing/urbantest/build/urbantest.build/Release-iphoneos/urbantest.build/Objects-normal/armv7/urbantest

ld: duplicate symbol _OBJC_CLASS_$_UA_ASIDownloadCache in /Users/mbp/Apps/Testing/urbantest/Air开发者_开发知识库ship/libUAirship-1.0.4.a(UA_ASIDownloadCache.o) and /Users/mbp/Apps/Testing/urbantest/build/urbantest.build/Release-iphoneos/urbantest.build/Objects-normal/armv7/UA_ASIDownloadCache.o
collect2: ld returned 1 exit status

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

Plz help me solve it.

Seem like you are trying to use AirShip library for Push Notification that embed ASIHTTPRequest library. Have you also add by yourself ASIHTTPRequest for network stuff?

If yes the linker found two symbol with the same name (= two definition for the same class) one in AirShip Library and One in ASIHHTPRequest.

You can remove your ASIHTTPRequest and use the one shipped with AirShip library.