title: Warning message Attempting to create USE_BLOCK_IN_FRAME variable with block that isn't in the frame
body: <p>When setting <code>exception breakpoint</code> and debugging getting warning message that Catchpoint 2 (exception thrown).Current language:  auto; currently objective-c
  warning: Attempting to create <code>USE_BLOCK_IN_FRAME</code> variable with block that isn't in the frame.
  (gdb) </p>
  
  <p>What does it means.</p>
  
  <p>In my case in the mainviewcontroller on UIToolbar have plapause toggle button which when hits plays audio file and loads 20 view controllers one after the other by using perform selector </p>
  
  <pre><code>-(void)playpauseAction:(id)sender 
  {
  
   if  
  
    ([audioPlayer isPlaying]){
  
   [sender setImage:[UIImage imageNamed:@"play.png"] forState:UIControlStateSelected];
  
   [audioPlayer pause];
  
    } else {
  
   [sender setImage:[UIImage imageNamed:@"pause.png"] forState:UIControlStateNormal];
  
   [audioPlayer play];
  
   [self performSelector:@selector(displayviewsAction:) withObject:nil afterDelay:11.0];
  
    }  
  
  }
  
  - (void)displayviewsAction:(id)sender
  {
  FirstViewController *viewController = [[FirstViewController alloc] init];
  
  viewController.view.frame = CGRectMake(0, 0, 320, 480);
  
  [self.view addSubview:viewController.view];
  
  [self.view addSubview:toolbar];
  
  [self performSelector:@selector(secondViewController) withObject:nil afterDelay:23];
  
  [viewController release];
  
  }
  
  -(void)secondViewController {
  SecondViewController *secondController = [[SecondViewController alloc] init];
  
  secondController.view.frame = CGRectMake(0, 0, 320, 480);
  
  [self.view addSubview:secondController.view]; 
  
  [self.view addSubview:toolbar];
  
  [self performSelector:@selector(ThirdviewController) withObject:nil afterDelay:27];
  
  [secondController release];
  }
  </code></pre>
  
  <p>When simply try to run the application in simulator it works fine but when debug with exception breakpoint and hits play button to start debugging gets this warning message.</p>
  
  <p>Anyone have ideas what is going on with exception breakpoint.</p>