I have this problem when I simulate my app, its not an error or a warning but it appears in my console, has anyone ever experienced this before?
I had lot of problem with the same issue. I solved this by this way
1) You're not using UIViewController's designated initializer initWithNibName:bundle:. Try using it instead of just init.
2) set animated:YES to a NO, and that solved the problem.
eg. [self.navigationController pushViewController: viewController_Obj animated:NO];