Crash when loading TTPhotoViewController

[malcom]

Hello, I've successfully implemented TTThumbsViewController.
Now I would to open a TTPhotoViewController in order to browse my photo.
Below the code I've used (it's called when users click a row in a normal UITableView)
Everything works fine but when the single image loads app crashes with this error:
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[NSPlaceholderString initWithFormat:locale:arguments:]: nil argument'

This is the stack frame image:
Imageshack - screenshot20091004at130

Any idea?

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
 	BMWStandardTableCell *cell = ((BMWStandardTableCell*)[tableView cellForRowAtIndexPath:indexPath]);	
	// Display the updated photoSource.
	[_photoshource release];
	[thumbs_controller release];
	
	_photoshource = [[self dataSourceForList: [_x_fetcher galleryForTitle:cell.fld_line1.text]
								  withTitle: cell.fld_line1.text] retain];
	thumbs_controller = [[TTThumbsViewController alloc] init];
    [thumbs_controller setPhotoSource:_photoshource];
	thumbs_controller.delegate = self;
	[self.navigationController pushViewController:thumbs_controller animated:YES]; 

	[tableView deselectRowAtIndexPath:indexPath animated:YES];
}

- (void)thumbsViewController:(TTThumbsViewController*)controller didSelectPhoto:(id<TTPhoto>)photo {
	[_photocontroller release];
	_photocontroller = [[controller createPhotoViewController] retain]; 
	_photocontroller.centerPhoto = photo; 
	[self.navigationController pushViewController:_photocontroller animated:YES]; 
}

- (MockPhotoSource *) dataSourceForList:(NSArray *) _array withTitle:(NSString *) _ptitle {
	NSMutableArray *_list = [[NSMutableArray alloc] init];

	[_list addObject: [[[MockPhoto alloc]
      initWithURL:@"http://farm4.static.flickr.com/3106/3203111597_d849ef615b.jpg?v=0"
      smallURL:@"http://farm4.static.flickr.com/3106/3203111597_d849ef615b_t.jpg"
						size:CGSizeMake(320, 480)] autorelease]];
	/*
	for (BMWGalleryResource *gItem in _array) {
		NSString *_galleryURL = [NSString stringWithFormat:kGalleryThumbURLFormat,gItem.p_photoID_link];
		MockPhoto *_photo = [[[MockPhoto alloc] initWithURL: _galleryURL
											   smallURL: _galleryURL
												   size:CGSizeMake(960, 1280)] autorelease];
		[_photo setCaption:@"merda"];
		
		[_list addObject:_photo];
		[_photo release];
	}*/
	MockPhotoSource *source= [[MockPhotoSource alloc] initWithType:MockPhotoSourceNormal
															 title:_ptitle
															photos:_list
														   photos2:_list];
	[_list release];
	return [source autorelease];
}

[Azira]

I've got a similar problem. Did you find a solution, or what caused the problem?

[ar1013arun]

You might not have added Three20.bundle..that too will create the same kind of problem !!!