Question

I have a modal view controller which is crashing when it dismisses itself. The error is EXC_BAD_ACCESS (yipee). I am tryin got use NSZombie to work out the problem. I get am getting the following :

2010-10-20 17:15:58.936 [24058:207] AddRunningClient starting device on non-zero client count
2010-10-20 17:16:06.846 [24058:207] * -[ViewController retain]: message sent to deallocated instance 0x6c2d4a0

What does this mean – does it mean that a message was sent to the Viewcontroller or that a message was sent to an object in the Viewcontroller ?

I am really stuck as the thread seems to be main 🙁

Thanks all in advance for any help,

Martin

EDIT

Thanks all for the quick replies. Here is how I am presenting the view controller :

-(IBAction)letsstartGame {

ViewController * sl = [[ViewController alloc] initWithNibName:@"ViewController" bundle:[NSBundle mainBundle]];  
self.viewLink = sl;
[sl release];

[mainMenu stop];
[mainMenu setCurrentTime:0.0];

[self presentModalViewController:viewLink animated:NO];

[viewLink release];
self.viewLink = nil;

}

And dismiss like this :

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {

if (waitingOver) {

    [backgroundMain stop];
    [fireworks stop];

    [self dismissModalViewControllerAnimated:NO];

}   

}

Answer 1

That means that you had an instance of an object of type ViewController, it was deallocated, and then you tried to retain it.

edit

You’re over-releasing the object. Here’s what you’re doing:

ViewController * sl = [[ViewController alloc] initWithNibName:@"ViewController" bundle:[NSBundle mainBundle]];  //allocated, has a +1 retain count
self.viewLink = sl;  //assuming a retain property, has a +2 retain count
[sl release]; //releasing, now has +1 retain count
....    
[viewLink release]; //releasing, now has a 0 retain count
self.viewLink = nil; //attempting to release stale pointer, will result in a crash (perhaps not immediately, but eventually)

Get rid of the [viewLink release] line. It is wrong to have that in there.