app works on simulator but not on iPhone - ios5

Question

I have developed and iPhone app and it seems to work fine on the simulator 5.0. However, when I tried to test it on the real device, an iphone w/ ios 5, it's not working.
The app launched but all I see was a black screen.
Here's the crash log I found in the Device Log
Sorry I am pretty new to this.. I am not sure if these are symbolicated. (seems like they are?)
Incident Identifier: B2601015-4CBF-478D-B9C3-2D2B4BEED892
CrashReporter Key: 9c71d7c2ed64b2862a0a6d90e3d4ce839868a03c
Hardware Model: iPhone4,1
Process: memoryChallenger [21037]
Path: /var/mobile/Applications/C0981716-8CDF-4816-8E94- 261CD8F164FD/memoryChallenger.app/memoryChallenger
Identifier: memoryChallenger
Version: ??? (???)
Code Type: ARM (Native)
Parent Process: launchd [1]
Date/Time: 2012-01-30 21:54:18.753 -0800
OS Version: iPhone OS 5.0.1 (9A405)
Report Version: 104
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x00000000, 0x00000000
Crashed Thread: 0
Last Exception Backtrace:
0 CoreFoundation 0x37ecb8bf __exceptionPreprocess + 163
1 libobjc.A.dylib 0x319b11e5 objc_exception_throw + 33
2 CoreFoundation 0x37ecb7b9 +[NSException raise:format:] + 1
3 CoreFoundation 0x37ecb7db +[NSException raise:format:] + 35
4 UIKit 0x354f7747 -[UINib instantiateWithOwner:options:] + 1567
5 UIKit 0x354f8bb9 -[NSBundle(UINSBundleAdditions) loadNibNamed:owner:options:] + 137
6 UIKit 0x35431a45 -[UIApplication _loadMainNibFileNamed:bundle:] + 37
7 UIKit 0x352bb227 -[UIApplication _loadMainInterfaceFile] + 223
8 UIKit 0x352b5313 -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 227
9 UIKit 0x35283921 -[UIApplication handleEvent:withNewEvent:] + 1017
10 UIKit 0x352833bf -[UIApplication sendEvent:] + 55
11 UIKit 0x35282d2d _UIApplicationHandleEvent + 5809
12 GraphicsServices 0x379a0df3 PurpleEventCallback + 883
13 CoreFoundation 0x37e9f553 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 39
14 CoreFoundation 0x37e9f4f5 __CFRunLoopDoSource1 + 141
15 CoreFoundation 0x37e9e343 __CFRunLoopRun + 1371
16 CoreFoundation 0x37e214dd CFRunLoopRunSpecific + 301
17 CoreFoundation 0x37e213a5 CFRunLoopRunInMode + 105
18 UIKit 0x352b4457 -[UIApplication _run] + 551
19 UIKit 0x352b1743 UIApplicationMain + 1091
20 memoryChallenger 0x000050d9 main (main.m:14)
21 memoryChallenger 0x000027ec start + 40
Thread 0 name: Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0 libsystem_kernel.dylib 0x3376532c __pthread_kill + 8
1 libsystem_c.dylib 0x36331f54 pthread_kill + 48
2 libsystem_c.dylib 0x3632afe4 abort + 88
3 libc++abi.dylib 0x37e10f64 abort_message + 40
4 libc++abi.dylib 0x37e0e346 _ZL17default_terminatev + 18
5 libobjc.A.dylib 0x319b12dc _objc_terminate + 140
6 libc++abi.dylib 0x37e0e3be _ZL19safe_handler_callerPFvvE + 70
7 libc++abi.dylib 0x37e0e44a std::terminate() + 14
8 libc++abi.dylib 0x37e0f81e __cxa_rethrow + 82
9 libobjc.A.dylib 0x319b122e objc_exception_rethrow + 6
10 CoreFoundation 0x37e2153e CFRunLoopRunSpecific + 398
11 CoreFoundation 0x37e2139e CFRunLoopRunInMode + 98
12 UIKit 0x352b4450 -[UIApplication _run] + 544
13 UIKit 0x352b173c UIApplicationMain + 1084
14 memoryChallenger 0x000050d2 main (main.m:14)
15 memoryChallenger 0x000027e4 start + 32
Thread 1 name: Dispatch queue: com.apple.libdispatch-manager
Thread 1:
0 libsystem_kernel.dylib 0x337553b4 kevent + 24
1 libdispatch.dylib 0x37b89f74 _dispatch_mgr_invoke + 708
2 libdispatch.dylib 0x37b89c92 _dispatch_mgr_thread + 30
Thread 2:
0 libsystem_kernel.dylib 0x33765cd4 __workq_kernreturn + 8
1 libsystem_c.dylib 0x362ee30a _pthread_wqthread + 610
2 libsystem_c.dylib 0x362ee09c start_wqthread + 0
Thread 3:
0 libsystem_kernel.dylib 0x33765cd4 __workq_kernreturn + 8
1 libsystem_c.dylib 0x362ee30a _pthread_wqthread + 610
2 libsystem_c.dylib 0x362ee09c start_wqthread + 0
Thread 4 name: WebThread
Thread 4:
0 libsystem_kernel.dylib 0x33755010 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x33755206 mach_msg + 50
2 CoreFoundation 0x37e9f41c __CFRunLoopServiceMachPort + 120
3 CoreFoundation 0x37e9e154 __CFRunLoopRun + 876
4 CoreFoundation 0x37e214d6 CFRunLoopRunSpecific + 294
5 CoreFoundation 0x37e2139e CFRunLoopRunInMode + 98
6 WebCore 0x326f2128 _ZL12RunWebThreadPv + 396
7 libsystem_c.dylib 0x362f3c16 _pthread_start + 314
8 libsystem_c.dylib 0x362f3ad0 thread_start + 0
Thread 0 crashed with ARM Thread State:
r0: 0x00000000 r1: 0x00000000 r2: 0x00000001 r3: 0x00000000
r4: 0x00000006 r5: 0x3f31dce8 r6: 0x00000002 r7: 0x2fdff864
r8: 0x3f14edec r9: 0x00000000 r10: 0x00188cc0 r11: 0x00185b40
ip: 0x00000148 sp: 0x2fdff858 lr: 0x36331f5b pc: 0x3376532c
cpsr: 0x00000010
it seems like this line here is what I am looking for..
20 memoryChallenger 0x000050d9 main (main.m:14)
and it's this line in main:
int retVal = UIApplicationMain(argc, argv, nil, nil);
But it's not getting me anywhere..
Can someone please guide me to the right direction?
Thanks!

Answer 1

From this line,
-[UINib instantiateWithOwner:options:] + 1567
it looks like your application's XIB file wasn't copied over properly to device.
Do a clean install.

Answer 2

For my case, it is due to the XIB file not found for iOS 5 (even though it's copied into the app bundle).
It is due to using Base Internationalization, which is only supported in iOS 6.
Strangely, running on Simulator with iOS 5 will work. That got to be a bug.
I have detailed my experience after releasing my app with this dumb startup crash: http://samwize.com/2012/11/22/warning-do-not-use-base-internationalization-in-ios-5/

Answer 3

In IB, xib's Target Membership -> current target is not checked
Just another scenario when this occurs.