TInvalidDataTypeException

1792:      */
1793:     public function insertAt($index,$item)
1794:     {
1795:         if($item instanceof TControl)
1796:         {
1797:             parent::insertAt($index,$item);
1798:             $this->_o->addedControl($item);
1799:         }
1800:         else if(is_string($item) || ($item instanceof IRenderable))
1801:             parent::insertAt($index,$item);
1802:         else
1803:             throw new TInvalidDataTypeException('controlcollection_control_required');
1804:     }
1805: 
1806:     /**
1807:      * Removes an item at the specified position.
1808:      * This overrides the parent implementation by performing additional
1809:      * cleanup work when removing a child control.
1810:      * @param integer the index of the item to be removed.
1811:      * @return mixed the removed item.
1812:      */
1813:     public function removeAt($index)
1814:     {
1815:         $item=parent::removeAt($index);

#0 /home/architetti/prado/prado-3.1.0RC.r1951/framework/Collections/TList.php(322): TControlCollection->insertAt(0, false)
#1 /home/architetti/fondazione.ordinearchitetti.mi.it/protected/Pages/Fondazione/Statuto.php(19): TList->offsetSet(NULL, false)
#2 /home/architetti/prado/prado-3.1.0RC.r1951/framework/Web/UI/TControl.php(1259): Statuto->onInit(NULL)
#3 /home/architetti/prado/prado-3.1.0RC.r1951/framework/Web/UI/TCompositeControl.php(35): TControl->initRecursive(NULL)
#4 /home/architetti/prado/prado-3.1.0RC.r1951/framework/Web/UI/TTemplateControl.php(240): TCompositeControl->initRecursive(NULL)
#5 /home/architetti/prado/prado-3.1.0RC.r1951/framework/Web/UI/TPage.php(202): TTemplateControl->initRecursive()
#6 /home/architetti/prado/prado-3.1.0RC.r1951/framework/Web/UI/TPage.php(193): TPage->processNormalRequest(Object(THtmlWriter))
#7 /home/architetti/prado/prado-3.1.0RC.r1951/framework/Web/Services/TPageService.php(442): TPage->run(Object(THtmlWriter))
#8 /home/architetti/prado/prado-3.1.0RC.r1951/framework/Web/Services/TPageService.php(388): TPageService->runPage(Object(Statuto), Array)
#9 /home/architetti/prado/prado-3.1.0RC.r1951/framework/TApplication.php(1066): TPageService->run()
#10 /home/architetti/prado/prado-3.1.0RC.r1951/framework/TApplication.php(376): TApplication->runService()
#11 /home/architetti/fondazione.ordinearchitetti.mi.it/index.php(22): TApplication->run()
#12 {main}