Iphone开发xcode4.0运行书下例子报错Thread 1:Program received signal:"SIGABRT"

Iphone开发xcode4.0运行书上例子报错Thread 1:Program received signal:"SIGABRT"
书上例子“多视图应用程序” 
- (void)viewDidLoad 
{ 
    BlueViewController *blueController = [[BlueViewController alloc] 
    initWithNibName:@"BlueView" bundle:nil]; 
    self.blueViewController = blueController; 
    [self.view insertSubview:blueController.view atIndex:0];-----------------这里报错Thread 1:Program received signal:"SIGABRT" 
    [blueController release]; 
    [super viewDidLoad]; 
   // Do any additional setup after loading the view from its nib. 
} 
我是新手，在网上找了好多方法都试过不行啊，哪位大虾帮忙解决下是什么原因啊？？？
------解决方案--------------------
打印一下blueController对象，看看生成了没
------解决方案--------------------
BlueViewController *blueController = [[BlueViewController alloc]  
  initWithNibName:@"BlueView" bundle:nil];  

BlueView的nib存在么