You need to read the actual exception message. It's almost certainly telling 
you that the number of rows in the dataSource is different than what's expected 
based on the updates you've made. 

Luke

On Aug 21, 2012, at 11:49 PM, "Laurent Daudelin" <[email protected]> 
wrote:

> iOS 5.0 simulator or device.
> 
> When I call this method like this:
>                [[NSOperationQueue mainQueue] addOperationWithBlock:^{
>                [self.tableView reloadRowsAtIndexPaths:[NSArray 
> arrayWithObjects:
>                                                        [NSIndexPath 
> indexPathForRow:0 inSection:0],
>                                                        [NSIndexPath 
> indexPathForRow:1 inSection:0],
>                                                        [NSIndexPath 
> indexPathForRow:2 inSection:0],
>                                                        [NSIndexPath 
> indexPathForRow:3 inSection:0],
>                                                        nil]
>                                      
> withRowAnimation:UITableViewRowAnimationNone];
>                }];
> 
> the app crashes with a SIGTRAP:
> 2012-08-21 23:48:05.173 Erodr[15594:c07] *** Assertion failure in 
> -[UITableView _endCellAnimationsWithContext:], 
> /SourceCache/UIKit_Sim/UIKit-1912.3/UITableView.m:1046
> 
> However, if I send the same tableview reloadData, then all is fine.
> 
> What's wrong with my reloadRowsAtIndexPath:withRowAnimations:?
> 
> -Laurent.
> -- 
> Laurent Daudelin
> AIM/iChat/Skype:LaurentDaudelin                http://www.nemesys-soft.com/
> Logiciels Nemesys Software                    [email protected]
> 
> 
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