key nil

gistfile1.txt

restkit.network:RKObjectRequestOperation.m:250 POST 'http://tanuwidjaja.net/mafotest/sc/shop/aList/0/0/20' (200 OK / 1 objects) [request=0.0000s mapping=0.0030s total=0.5055s]
2014-11-15 10:51:21.368 MavoIOS[2332:51320] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** setObjectForKey: key cannot be nil'
*** First throw call stack:
(
	0   CoreFoundation                      0x0000000101f34f35 __exceptionPreprocess + 165
	1   libobjc.A.dylib                     0x0000000101bcdbb7 objc_exception_throw + 45
	2   CoreFoundation                      0x0000000101e3b998 -[__NSDictionaryM setObject:forKey:] + 968
	3   MavoIOS                             0x000000010043a23b -[SimpleTableViewController onListSuccess:] + 539
	4   MavoIOS                             0x000000010042e773 __26-[ShopManager doShopList:]_block_invoke + 179
	5   MavoIOS                             0x000000010051693b __66-[RKObjectRequestOperation setCompletionBlockWithSuccess:failure:]_block_invoke242 + 91
	6   libdispatch.dylib                   0x00000001036d7ba6 _dispatch_call_block_and_release + 12
	7   libdispatch.dylib                   0x00000001036f57f4 _dispatch_client_callout + 8
	8   libdispatch.dylib                   0x00000001036de8fb _dispatch_main_queue_callback_4CF + 949
	9   CoreFoundation                      0x0000000101e9cfe9 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 9
	10  CoreFoundation                      0x0000000101e5feeb __CFRunLoopRun + 2043
	11  CoreFoundation                      0x0000000101e5f486 CFRunLoopRunSpecific + 470
	12  GraphicsServices                    0x00000001054a69f0 GSEventRunModal + 161
	13  UIKit                               0x0000000102321420 UIApplicationMain + 1282
	14  MavoIOS                             0x000000010045ef13 main + 115
	15  libdyld.dylib                       0x000000010372a145 start + 1
	16  ???                                 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)