Thread 1: Signal SIGABRT caused from systemSound - ios

Question

Hey I am very new to programming in x-code and I have been following geeky lemon's tutorial, and I wanted to add sound into my project. I am trying to create a simple piano application. I have followed every step correctly, and my code was exactly same as their although when I ran the program, the iphone simulator froze at black screen and opened xcode with
Thread 1: Signal SIGABRT in
int main(int argc, char *argv[])
{
#autoreleasepool {
return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
}T}
In the console the error was:
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '* -[NSURL initFileURLWithPath:]: nil string parameter'
* First throw call stack:
My code is:
.h
#import <UIKit/UIKit.h>
#import <AudioToolbox/AudioToolbox.h>
#interface ViewController : UIViewController
{
SystemSoundID soundID;
}
- (IBAction)c1Press:(id)sender;
#end
.m
#import "ViewController.h"
#interface ViewController ()
#end
#implementation ViewController
- (void)viewDidLoad
{
NSURL *buttonURL = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:#"Resource/Audio/keys/C1" ofType:#"MP3"]];
AudioServicesCreateSystemSoundID((__bridge CFURLRef) buttonURL, &soundID);
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)c1Press:(id)sender {
AudioServicesPlaySystemSound(soundID);
}
#end
I have done some research on this, and one answer was that the bundle was not in properly or something like that, but I checked in my build Phases and all my resources are all there and none are red.