RubyMotion: Error – Unrecognized Selector Sent to Instance

This error burned a lot of my time.  The error messaging isn’t very clear here.  Here’s the error: 2014-10-10 11:06:10.800 countdownTimer[15329:8966558] *** Terminating app due to uncaught exception ‘NSInvalidArgumentException’, reason: ‘-[MeditationTimerController Welcome 1:59]: unrecognized selector sent to instance 0xb6a7ca0’ *** First throw call stack: ( 0 CoreFoundation 0x022fadf6 __exceptionPreprocess + Continue Reading