Hello , I am developing an iphone application using "AVAudioPlayer" for playing a ".wav" file . For this i am adding header file "#import <AVFoundation/AVAudioPlayer.h>" . But while compiling i am getting error like : ".objc_class_name_AVAudioPlayer", referenced from: literal-pointer@__OBJC@__cls_refs@AVAudioPlayer in WebviewController.o ld: symbol(s) not found collect2: ld returned 1 exit status" . So can you please tell me the solution for this type of error.... Thanks & Regards, KamalBhr "