Imprima la instancia en el problema de la console Xcode

Utilizo el command po en la console Xcode para verificar la información necesaria. Entonces, después de usar po vc , tengo esto:

 (lldb) po vc error: field '__FuncPtr' declanetworking with incompatible types in different translation units ('void (*)(id)' vs. 'void (*)()') error: instance variable '_afterAppearance' declanetworking with incompatible types in different translation units ('__block_literal_generic *' vs. '__block_literal_generic *') note: declanetworking here with type 'void (*)()' note: declanetworking here with type '__block_literal_generic *' error: 2 errors parsing expression 

po vc es mi UIViewController. Lo he comprobado en este bloque de código después de init:

 + (MyVC *)_new; { MyVC *vc = [[MyVC alloc] initWithNibName:nil bundle:nil]; return vc; }