I received this message from the debugger console : 

> 
> -[UIButton release]: message sent to deallocated instance 0x1836b0
> 
> 
> 

But I don't create UIButton programmatically, all my buttons have created in Interface Builder. Each of them are linked to a function, like this : 

> 
> -(IBAction)theFunction:(UIButton \*)sender;
> 
> 
> 

In lot of this functions, I don't use the variable sender. I don't even try to release it. So I don't understand why my application try to release my buttons.
Do I do something in Interface Builder to release or not my UIButton? Is it about the picture I put in the UIButton? If I use the variable (UIButton \*)sender, do I need to release it?
This problem stucks me because of it my application crashes.

Edit:

```
- (IBAction)showPopoverOverview:(UIButton *)sender {
    TouchPlanePopover *content = [[TouchPlanePopover alloc] init];
    [content setTheAlbum:@"Overview"];

    // Setup the popover for use in the detail view.
    detailViewPopover = [[UIPopoverController alloc] initWithContentViewController:content];
    detailViewPopover.popoverContentSize = CGSizeMake(600., 400.);
    detailViewPopover.delegate = self;  // Set the sender to a UIButton.

    // Present the popover from the button that was tapped in the detail view.
    [detailViewPopover presentPopoverFromRect:sender.frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];

    // Set the last button tapped to the current button that was tapped.
    lastTappedButton = sender;
    [content release];
}

```

detailViewPopover is create in .h like this : @property (nonatomic, retain) UIPopoverController \*detailViewPopover;

Thans for your help
Let me know if you need more information, I will edit the post