App crash at startup

[rams78]

2016-02-12 16:48:24.804 MidiMonitor[88004:1246323] *** Assertion failure in -[UIApplication _runWithMainScene:transitionContext:completion:], /BuildRoot/Library/Caches/com.apple.xbs/Sources/UIKit_Sim/UIKit-3512.30.14/UIApplication.m:3315 2016-02-12 16:48:24.807 MidiMonitor[88004:1246323] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Application windows are expected to have a root view controller at the end of application launch' *** First throw call stack: ( 0 CoreFoundation 0x00000001092f0e65 __exceptionPreprocess + 165 1 libobjc.A.dylib 0x0000000108cb4deb objc_exception_throw + 48 2 CoreFoundation 0x00000001092f0cca +[NSException raise:format:arguments:] + 106 3 Foundation 0x000000010713c4de -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 198 4 UIKit 0x000000010750f218 -[UIApplication _runWithMainScene:transitionContext:completion:] + 3122 5 UIKit 0x000000010750be7b -[UIApplication workspaceDidEndTransaction:] + 188 6 FrontBoardServices 0x000000010ab28754 -[FBSSerialQueue _performNext] + 192 7 FrontBoardServices 0x000000010ab28ac2 -[FBSSerialQueue _performNextFromRunLoopSource] + 45 8 CoreFoundation 0x000000010921ca31 CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 17 9 CoreFoundation 0x000000010921295c __CFRunLoopDoSources0 + 556 10 CoreFoundation 0x0000000109211e13 __CFRunLoopRun + 867 11 CoreFoundation 0x0000000109211828 CFRunLoopRunSpecific + 488 12 UIKit 0x000000010750b7cd -[UIApplication _run] + 402 13 UIKit 0x0000000107510610 UIApplicationMain + 171 14 MidiMonitor 0x0000000106fd5bde main + 62 15 libdyld.dylib 0x000000010a4e892d start + 1 16 ??? 0x0000000000000001 0x0 + 1 ) libc++abi.dylib: terminating with uncaught exception of type NSException (lldb)

Emulator (iPhone 6 Plus iOS 9.2)

[Xample]

replace PGMidi > Sources > UI > MidiMonitorAppDelegate.m - line 23, with [window setRootViewController:viewController];

[iooops]

Thanks! It solved my problem.