Debugging iphone

I get the following error for a fast i application made for iOS. I had an installation notification using this example. How can I debug this and find out what the problem is?

Crashed: com.apple.UNSNotificationRegistrarConnection EXC_BAD_ACCESS KERN_INVALID_ADDRESS 0x0000013000001328 Crashed: com.apple.UNSNotificationRegistrarConnection 0 libobjc.A.dylib 0x180cf9b9c objc_msgSend + 28 1 UserNotificationServices 0x183038b54 __destroy_helper_block_27 + 40 2 libsystem_blocks.dylib 0x1811298e8 _Block_release + 156 3 libdispatch.dylib 0x1810cd47c _dispatch_client_callout + 16 4 libdispatch.dylib 0x1810d94c0 _dispatch_queue_drain + 864 5 libdispatch.dylib 0x1810d0f80 _dispatch_queue_invoke + 464 6 libdispatch.dylib 0x1810cd47c _dispatch_client_callout + 16 7 libdispatch.dylib 0x1810db914 _dispatch_root_queue_drain + 2140 8 libdispatch.dylib 0x1810db0b0 _dispatch_worker_thread3 + 112 9 libsystem_pthread.dylib 0x1812e5470 _pthread_wqthread + 1092 10 libsystem_pthread.dylib 0x1812e5020 start_wqthread + 4 
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