Thread 1: signal SIGABRT when run on real iPhone?

Question

Objective-C

Accordingly, the problem is this, I launch a project on the iPhone (the simplest one, the button is tied to the label and the text), gives the log below, and points to the line of the main class with the addition Thread 1: signal SIGABRT (on the emulator, in general, a springboard error, and not with my power use it):

return UIApplicationMain(argc, argv, nil, NSStringFromClass([mnpAppDelegate class]));

2013-12-26 19:47:17.993 FirstAction[6026:60b] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<mnpViewController 0x17e98a40> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key _myField.'
*** First throw call stack:
(0x2e22ce83 0x385896c7 0x2e22cb89 0x2eb6c3b7 0x2eb7dffd 0x2e19c7e9 0x30d104df 0x30c720fb 0x30ad3b59 0x309b579d 0x309b5719 0x309bc3f1 0x309b9ae5 0x30a2482d 0x30a215fd 0x30a1bb41 0x309b6a07 0x309b5cfd 0x30a1b321 0x32e9b76d 0x32e9b357 0x2e1f7777 0x2e1f7713 0x2e1f5edf 0x2e160471 0x2e160253 0x30a1a5c3 0x30a15845 0x9d275 0x38a82ab7)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)

Answer 1

Apparently, in some of your xibs or storyboards, there is an outlet tied to the (already) non-existent field _myField of the mnpViewController class