Application Specific Information: *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[CFStreamDelegate scheduleInRunLoop:forMode:]: unrecognized selector sent to instance 0x28082d940' 0 CoreFoundation 0x00000001b1e4bae4 0x00000001b1d32000 + 1153764 1 libobjc.A.dylib 0x00000001c5ca2cb4 0x00000001c5c99000 + 40116 2 CoreFoundation 0x00000001b1d5bf5c 0x00000001b1d32000 + 171868 3 CoreFoundation 0x00000001b1e4e128 0x00000001b1d32000 + 1163560 4 CoreFoundation 0x00000001b1e5009c 0x00000001b1d32000 + 1171612 5 *** 0x00000001037922bc -[ASIInputStream scheduleInRunLoop:forMode:] (ASIInputStream.m:95) 6 CFNetwork 0x00000001b2653570 0x00000001b2420000 + 2307440 7 CFNetwork 0x00000001b2502db0 0x00000001b2420000 + 929200 8 CFNetwork 0x00000001b2502460 0x00000001b2420000 + 926816 9 CFNetwork 0x00000001b24fdee8 0x00000001b2420000 + 909032 10 CFNetwork 0x00000001b24b92ec 0x00000001b2420000 + 627436 11 CFNetwork 0x00000001b24dd13c 0x00000001b2420000 + 774460 12 CFNetwork 0x00000001b25196dc 0x00000001b2420000 + 1021660 13 CoreFoundation 0x00000001b1de7058 0x00000001b1d32000 + 741464 14 CoreFoundation 0x00000001b1de4118 0x00000001b1d32000 + 729368 15 CoreFoundation 0x00000001b1de3ed0 0x00000001b1d32000 + 728784 16 CFNetwork 0x00000001b252a2d8 0x00000001b2420000 + 1090264 17 CoreFoundation 0x00000001b1dd5e94 0x00000001b1d32000 + 671380 18 CoreFoundation 0x00000001b1dcbd18 0x00000001b1d32000 + 630040 19 CoreFoundation 0x00000001b1dcbc18 0x00000001b1d32000 + 629784 20 CoreFoundation 0x00000001b1dcaf60 0x00000001b1d32000 + 626528 21 CoreFoundation 0x00000001b1dc5508 0x00000001b1d32000 + 603400 22 CoreFoundation 0x00000001b1dc4cc8 0x00000001b1d32000 + 601288 23 Foundation 0x00000001b2fdba48 0x00000001b2fd4000 + 31304 24 *** 0x000000010381b178 -[ASIHTTPRequest startSynchronous] (ASIHTTPRequest.m:806) 25 *** 0x00000001034be530 -[XXXBaseRequest sendHttpRequest] (XXXBaseRequest.m:491) 26 *** 0x0000000103495d8c 79-[XXXNetworkClient getDataWithRequest:successBlock:failureBlock:handleSerial:]blockinvoke (XXXNetworkClient.m:102) 27 libdispatch.dylib 0x00000001b1a84298 0x00000001b1a24000 + 393880 28 libdispatch.dylib 0x00000001b1a85280 0x00000001b1a24000 + 397952 29 libdispatch.dylib 0x00000001b1a2a558 0x00000001b1a24000 + 25944 30 libdispatch.dylib 0x00000001b1a29c9c 0x00000001b1a24000 + 23708 31 libdispatch.dylib 0x00000001b1a37108 0x00000001b1a24000 + 78088 32 libdispatch.dylib 0x00000001b1a378d0 0x00000001b1a24000 + 80080 33 libsystempthread.dylib 0x00000001f8101568 0x00000001f80f6000 + 46440 34 libsystem_pthread.dylib 0x00000001f8104874 0x00000001f80f6000 + 59508 i start my application, crash when load request from webservice. Is there anyone who meeting the same question.