App Crash While hitting web Services - iphone

Question

I have a table view in which Iam selecting a row of the table view and then it hits the web services, retrieves data and then displayed. Now this is my error log Iam getting.
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-
[__NSCFData setDownloadedLogoImage:]: unrecognized selector sent to instance 0x806cf90'
*** Call stack at first throw:
(
0 CoreFoundation 0x02abdb99 __exceptionPreprocess + 185
1 libobjc.A.dylib 0x02c0d40e objc_exception_throw + 47
2 CoreFoundation 0x02abf6ab -[NSObject(NSObject) doesNotRecognizeSelector:] + 187
3 CoreFoundation 0x02a2f2b6 ___forwarding___ + 966
4 CoreFoundation 0x02a2ee72 _CF_forwarding_prep_0 + 50
5 FlightSearch 0x000401ef -[AirlineNames connectionDidFinishImage:] + 168
6 FlightSearch 0x0002f535 -[SAHttpManager connectionDidFinishLoading:] + 195
7 Foundation 0x001acb96 -[NSURLConnection(NSURLConnectionReallyInternal) sendDidFinishLoading] + 108
8 Foundation 0x001acaef _NSURLConnectionDidFinishLoading + 133
9 CFNetwork 0x0307172f _ZN19URLConnectionClient23_clientDidFinishLoadingEPNS_26ClientConnectionEventQueueE + 285
10 CFNetwork 0x0313cfcf _ZN19URLConnectionClient26ClientConnectionEventQueue33processAllEventsAndConsumePayloadEP20XConnectionEventInfoI12XClientEvent18XClientEventParamsEl + 389
11 CFNetwork 0x03066968 _ZN19URLConnectionClient13processEventsEv + 100
12 CFNetwork 0x030667e5 _ZN17MultiplexerSource7performEv + 251
13 CoreFoundation 0x02a9efaf __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15
14 CoreFoundation 0x029fd39b __CFRunLoopDoSources0 + 571
15 CoreFoundation 0x029fc896 __CFRunLoopRun + 470
16 CoreFoundation 0x029fc350 CFRunLoopRunSpecific + 208
17 CoreFoundation 0x029fc271 CFRunLoopRunInMode + 97
18 GraphicsServices 0x032b000c GSEventRunModal + 217
19 GraphicsServices 0x032b00d1 GSEventRun + 115
20 UIKit 0x00419af2 UIApplicationMain + 1160
21 FlightSearch 0x00001e86 main + 84
22 FlightSearch 0x00001e29 start + 53
23 ??? 0x00000001 0x0 + 1
)
terminate called after throwing an instance of 'NSException'
Kindly suggest me what should i do.

Answer 1

You're sending the message setDownloadedLogoImage: to an NSData object, which has no idea what to do with it! One of two things has happened:
1) You have not retained something. Take a look at whatever object you expect to call setDownloadedLogoImage on and find out where you create it - you should probably be retaining it there ;)
2) (less likely) Your code is just wrong! Add it to your question and we can take a look.