Hello, Actionscript 3 question. please help!

Question

Hello, I'm new to Actionscript 3 and still getting the hang of all the changes and such. However, one problem is sorely annoying me, and I need some outside opinions on what could be wrong. The code is basically a rewritten version of some code I found someplace else, and my main goal is to find out the error with the code. The code looks like:
package
import flash.display.MovieClip;
import flash.events.MouseEvent;
public class Main extends MovieClip
var sceneOne:SceneOne;
var sceneTwo:SceneTwo;
var sceneThree:SceneThree;
public function Main()
sceneOne = new SceneOne(); trace("Working");
sceneTwo = new SceneTwo(); trace("Working");
sceneThree = new SceneThree(); trace("Working");
addChild(sceneOne); trace("Working");
//Add event listeners
this.sceneTwo.OutsideButton.addEventListener(MouseEvent.CLICK, onHillButtonClick); trace("Working");
this.sceneTwo.bathroomButton.addEventListener(MouseEvent.CLICK, onPondButtonClick); trace("Working");
this.sceneOne.livingRoomButton.addEventListener(MouseEvent.CLICK, onBackButtonClick_Hill); trace("Working");
this.sceneThree.livingRoomButton.addEventListener(MouseEvent.CLICK, onBackButtonClick_Pond); trace("Working");
//Event handlers
function onHillButtonClick(event:MouseEvent):void
addChild(sceneOne);
removeChild(sceneTwo);
function onPondButtonClick(event:MouseEvent):void
addChild(sceneThree);
removeChild(sceneTwo);
function onBackButtonClick_Hill(event:MouseEvent):void
addChild(sceneTwo);
removeChild(sceneOne);
function onBackButtonClick_Pond(event:MouseEvent):void
addChild(sceneTwo);
removeChild(sceneThree);
The error is occuring @ line 22, saying:
TypeError: Error #1010: A term is undefined and has no properties.
at Main()[/Users/Mike/Documents/Main.as:22]
I'm unsure as to what the problem is, as I give it properties. Please help, thank you.

Answer 1

I think you should rethink the way you're constructing this...
I could be wrong but it has some flaws... example:
[email protected] wrote:
function onBackButtonClick_Hill(event:MouseEvent):void{
addChild(sceneTwo);
removeChild(sceneOne);
looking to this function, I imagine a situation when you click a button to run this function...
it will add "sceneTwo" to the stage and remove sceneOne... Ok!, but what if we were on sceneThree and not on sceneOne?
It will try to remove a scene that doesn't exist.
If that's the problem, you could solve it by using if statements for example.
Another way is to create a var called something like "currentScene" and at the end of every function/method you first remove the currentScene, then add the new child and set it as your "new" currentScene.
Well, it's just a guess anyway
I'm going to sleep now
Hope you solve your problem.