重新加载节索引时出现奇怪错误?

我正在使用 iPhone SDK 和 Objective-C 和 我收到此错误消息:

断言失败-[uitableview\u endcellanimationswithcontext:],/sourcecache/uikit/uikit-984.38/uitableview.m:774 2010-01-08 13:24:16.842 myapp[628:20b]由于未捕获的异常“nsInternalConsistencyException”而终止应用程序,原因:“无效更新:第1节中的行数无效。更新后现有节中包含的行数(1)必须等于更新前该节中包含的行数(0),加上或减去从该节中插入或删除的行数(0插入,0删除)。

下面是我的代码以展开部分:

- (void)checkAction:(id)sender
{
    //The button is added as subview on a view and the view is section header custom view
    UIButton *Button = (UIButton*)sender;
    NSLog(@"Button Tag=%d",Button.tag);
    if([[self.MySectionIndexArray objectAtIndex:Button.tag] isEqualToString:@"UP"])
    {
        [self.MySectionIndexArray replaceObjectAtIndex:Button.tag withObject:@"DOWN"];
        [ButtonDrop setBackgroundImage:[UIImage imageNamed:@"Up.png"] forState:UIControlStateNormal];
        [TableDashBoard reloadSections:[NSIndexSet indexSetWithIndex:Button.tag] withRowAnimation:UITableViewRowAnimationFade];
    }
    else
    {
        [self.MySectionIndexArray replaceObjectAtIndex:Button.tag withObject:@"UP"];
        [ButtonDrop setBackgroundImage:[UIImage imageNamed:@"Down.png"] forState:UIControlStateNormal];
    }
    NSLog(@"self.MySectionIndexArray ka title = %@ at index Number=%d",self.MySectionIndexArray,Button.tag);
}