TypeError: Error #2007: Parameter text must be non-null

Question

I am new to AS period, but I am following some training videos for AS 3.0 to create a portfolio site where the images and text are loaded by xml.
I have followed the instructions to the letter; however I am getting the #2007 Parameter text must be not-null error.
I have pasted my code below:
var titleArray:Array = new Array();
var descriptionArray:Array = new Array();
var largeImageArray:Array = new Array();
var thumbnailImageArray:Array = new Array();
var imageNum:Number=0;
var totalImages:Number;
//XML
//load in XML
var XMLURLLoader:URLLoader = new URLLoader();
XMLURLLoader.load(new URLRequest("assets/portfolio/portfolio.xml"));
XMLURLLoader.addEventListener(Event.COMPLETE, processXML);
function processXML(event:Event):void {
var theXMLData:XML=new XML(XMLURLLoader.data);
totalImages=theXMLData.title.length();
for (var i:Number = 0; i < totalImages; i++) {
titleArray.push(theXMLData.title[i]);
descriptionArray.push(theXMLData.description[i]);
largeImageArray.push(theXMLData.largeImage[i]);
thumbnailImageArray.push(theXMLData.thumbImage[i]);
loadThumbnail();
myScrollPane.source=allThumbnails;
//LOAD THE THUMBNAILS
function loadThumbnail():void {
trace(imageNum);
var thumbLoader:Loader = new Loader();
thumbLoader.load(new URLRequest(thumbnailImageArray[imageNum]));
thumbLoader.x = 90*imageNum;
//stores the appropriate info for thumbnail
var thisLargeImage:String = largeImageArray[imageNum];
var thisTitle:String = titleArray[imageNum];
var thisDescription:String = descriptionArray[imageNum];
thumbLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, thumbLoaded);
function thumbLoaded(event:Event):void {
//add the thumbnails to the allThumbnails instance
allThumbnails.addChild(thumbLoader);
allThumbnails.buttonMode = true;
myScrollPane.update();
thumbLoader.addEventListener(MouseEvent.CLICK, loadMainImage1);
function loadMainImage1(event:MouseEvent):void {
largeUILoader.source=thisLargeImage;
selectedTitle.text=thisTitle;
selectedDesc.text=thisDescription;
//add to imageNum (1);
imageNum++;
if (imageNum<totalImages) {
loadThumbnail();
I know my error has something to do with this part of the code:
//stores the appropriate info for thumbnail
var thisLargeImage:String = largeImageArray[imageNum];
var thisTitle:String = titleArray[imageNum];
var thisDescription:String = descriptionArray[imageNum];
but I can't figure out what's wrong. When I test my movie, everything functions correctly except when I click on a different thumbnail, the proper description does not load. My xml file is set up correctly. Here is a bit of that code:
<?xml version="1.0" encoding="UTF-8"?>
<portfolio>
<!--Image 1-->
<title>Spark Your Imagination Ad</title>
<![CDATA[<description>These black & white ads were designed to run in the trade publication The Green Sheet in the Merchant Acquiring Industry</description>]]>
<largeImage>assets/portfolio/lg/1.jpg</largeImage>
<thumbImage>assets/portfolio/thumbs/1.jpg</thumbImage>
<!--Image 2-->
<title>Corporate Business Card - iMax Bancard</title>
<![CDATA[<description>This full color double-sided business card is the current standard card being used by employees and agents of iMax Bancard</description>]]>
<largeImage>assets/portfolio/lg/2.jpg</largeImage>
<thumbImage>assets/portfolio/thumbs/2.jpg</thumbImage>
</portfolio>
The only thing different with my xml code is that in the tutorial I am following, the <description></description> tags are on the outside of the CDATA tags (which I have seen examples of both)... but when I put the code that way, it causes breaks in my code at the first special character I use.
Any help is appreciated. Thanks, Jen

Answer 1

click file/publish settings/flash and tick "permit debugging".  retest.  the line number with the non-existant object will be in the error message.