NSInternalInconsistencyException error - ios

Question

I am having issues switching between view controllers.
My md360AppDelegate.h header looks like this
#import <UIKit/UIKit.h>
#class md360ViewController;
#interface md360AppDelegate : UIResponder <UIApplicationDelegate>
#property (strong, nonatomic) UIWindow *window;
#property (strong, nonatomic) md360ViewController *viewController;
#property (strong, nonatomic) UINavigationController *navigationController;
#end
and my md360AppDelegate.m implementation looks like this.
#import "md360AppDelegate.h"
#import "md360ViewController.h"
#implementation md360AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
self.viewController = [[md360ViewController alloc] initWithNibName:#"md360ViewController" bundle:nil];
self.navigationController = [[UINavigationController alloc] initWithRootViewController:self.viewController];
[self.navigationController setNavigationBarHidden:YES animated:YES];
[self.window setRootViewController:self.navigationController];
[self.window makeKeyAndVisible];
return YES;
}
#end
i am creating an instance of UINavigationController and storing it in navigationController property of this class.
I want to change the ViewController when a user click on a button in md360ViewController.
My md360ViewController.h looks like this.
#interface md360ViewController : UIViewController
#property IBOutlet UIButton *homePathwayBtn;
#property IBOutlet UIButton *homeDiseaseBtn;
#property IBOutlet UIButton *homePipelineBtn;
- (IBAction)homeButton:(id)sender;
#end
and my implementation looks something like
#import "md360ViewController.h"
#import "md360AppDelegate.h"
#import "pipeViewDisease.h"
#import <QuartzCore/QuartzCore.h>
- (IBAction)homeButton:(id)sender {
UIViewController *pipeViewDisease = [[UIViewController alloc] initWithNibName:#"pipeViewDiease" bundle:nil];
[self.navigationController pushViewController:pipeViewDisease animated:YES];
}
and when i click on UIButton the application crash with following message.
Terminating app due to uncaught exception
'NSInternalInconsistencyException', reason: 'Could not load NIB in
bundle: 'NSBundle
(loaded)' with name 'pipeViewDiease''
what could be the issue?

Answer 1

Probably just a misspelled NIB name:
initWithNibName:#"pipeViewDiease"
should be:
initWithNibName:#"pipeViewDisease"
^

Answer 2

Unless it's a spelling mistake (should be pipeViewDisease), this error usually occurs when files are re-named outside of the xCode environment.
To fix this:
remove the file in question from the project
re-import the files to your project.