exec_bad_access when loading view second time

[firebug]

when I start my game from the main menu for the first time everything works fine. But after I go back to the menu and try to start the game again I get an exec_bad_access error that says something about dyld_stub_arc4random
the exec_bad_access is occuring in this method

-(void)menutonewgame{
    thegameViewController *gameview = [[thegameViewController alloc] initWithNibName:@"thegame" bundle:nil];
    [self setGameViewController:gameview];
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:1.0];
    [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
    [UIView setAnimationTransition:UIViewAnimationTransitionCurlDown forView:window cache:NO];
    [viewController.view removeFromSuperview];
    [self.window addSubview:[gameViewController view]]; //ERROR OCCURS HERE
    [UIView commitAnimations];
    [gameview release];
}

and the only place i use arc4random is inside thegameViewController in this 1 method

int getnext(){
	int i;
	do{
		i = arc4random() % 100;
	}while(level[i]==0 || level[i]==(int)NULL);
    int next = level[i];
    return next;
}

any help would be greatly appreciated. thanks.

[nobre84]

What is "viewController" ? Are you sure there is always a viewController.view properly set when you call the method ? If you call removeFromSuperview on an object that has been released, it'll crash.

Is "gameViewController" retained in your setGameViewController method ? It must be retained or you'll crash later, because you released the "gameview" variable. If it is a property, use the retain keyword next to its declaration. If you implemented it, manually retain the new value, release the old one, THEN assign it to your variable.

[firebug]

Originally Posted by nobre84

What is "viewController" ? Are you sure there is always a viewController.view properly set when you call the method ? If you call removeFromSuperview on an object that has been released, it'll crash.

Is "gameViewController" retained in your setGameViewController method ? It must be retained or you'll crash later, because you released the "gameview" variable. If it is a property, use the retain keyword next to its declaration. If you implemented it, manually retain the new value, release the old one, THEN assign it to your variable.

the viewController is just the menu screen which seems to be working fine, its the next line
[self.window addSubview:[gameViewController view]];
thats causing problems. gameViewController is just an instance of thegameViewController that i declared in the appdelegate and it is being retained in its property.