DisplayObject must be a child of the caller.

Question

I am trying to remove the existing childs  (combobox and pods are the content in the page) using
viewStack.selectedChild.removeAllChildren();
in a tab click from the Viewstacks canvas.
then I am trying to add new child.
it gives this error.
The supplied DisplayObject must be a child of the caller.
at flash.display::DisplayObjectContainer/getChildIndex()
at mx.core::Container/setChildIndex()[C:\autobuild\3.2.0\frameworks\projects\framework\src\m x\core\Container.as:2449]
Please help me to fix this

Answer 1

private function onApplicationComplete():void{
var arrView:Array =new Array();arrView=viewStack.getChildren();
viewLength=arrView.length;
// Load pods.xml, which contains the pod layout. 
var httpService:HTTPService = new HTTPService();httpService.url =
"data/pods.xml";httpService.resultFormat =
"e4x";httpService.addEventListener(FaultEvent.FAULT, onFaultHttpService);
httpService.addEventListener(ResultEvent.RESULT, onResultHttpService);
httpService.send();
private function onFaultHttpService(e:FaultEvent):void{
Alert.show(
"Unable to load data/pods.xml.");}
public var viewXMLList:XMLList =new XMLList(); 
private function onResultHttpService(e:ResultEvent):void{
viewXMLList = e.result.view;
var podcontentbase:PodContentBase=new PodContentBase; 
var containerWindowManagerHash:Object = new Object();  
var len:Number = viewXMLList.length(); 
if (podLayoutManagers.length!=0)podLayoutManagers.splice(0,podLayoutManagers.length);
for (var i:Number = 0; i < len; i++) // Loop through the view nodes.{
// Create a canvas for each view node. 
var canvas:Canvas = new Canvas(); 
// PodLayoutManager handles resize and should prevent the need for 
// scroll bars so turn them off so they aren't visible during resizes.canvas.horizontalScrollPolicy =
"off";canvas.verticalScrollPolicy =
"off";canvas.label = viewXMLList[i].@label;
canvas.percentWidth = 100;
canvas.percentHeight = 100;
viewStack.addChild(canvas);
traceDL(viewStack);
// Create a manager for each view. 
var manager:PodLayoutManager = new PodLayoutManager();manager.container = canvas;
manager.id = viewXMLList[i].@id;
manager.addEventListener(LayoutChangeEvent.UPDATE, StateManager.setPodLayout);
// Store the pod xml data. Used when view is first made visible.podDataDictionary[manager] = viewXMLList[i].pod;
//podcontentbase.podDataDictionarycopy[manager] = viewXMLList[i].pod; 
podLayoutManagers.push(manager);
onchange();
private function onchange():void{
tabBar.dataProvider=viewStack;
var index:Number = StateManager.getViewIndex(); 
// Make sure the index is not out of range. 
// This can happen if a tab view was saved but then tabs were subsequently removed from the XML.index = Math.min(tabBar.numChildren - 1, index);
onItemClickTabBar(
new ItemClickEvent(ItemClickEvent.ITEM_CLICK, false, false, null, index));tabBar.selectedIndex = index;
private var indextab:Number; 
private function onItemClickTabBar(e:ItemClickEvent):void{
indextab = e.index;
StateManager.setViewIndex(indextab);
// Save the view index.viewStack.selectedIndex = indextab;
if( this.contains( viewStack.selectedChild) )viewStack.selectedChild.removeAllChildren();
traceDL(
this);