Error 1006: Not a function - actionscript-3

Question

I am getting the error in the title when trying to access a method in another class. I have the main class, ZombieBots, which is linked to a movie clip of the same name. I then have 3 more movie clips which all get added to the ZombieBots clip during runtime, and each of these have their own classes.
When I attempt to access a method within the ZombieBots class from one of the other 3 classes, I get error 1006.
The function I am attempting to access in the ZombieBots class, that cannot be accessed:
package {
import flash.events.*;
import flash.display.MovieClip;
import flash.geom.Rectangle;
public class ZombieBots extends MovieClip{
private var pLives:int;
private var pScore:int;
private var pSkill:int;
private var pItems:int;
private var characterMC:Character;
private var cGameObjs:Array;
public function ZombieBots() {
/*cGameObjs = new Array();
addCharacter();
addItems();
addBots();
pLives = 5 - pSkill;
pScore = 0;
pItems = pSkill + 5;*/
resetGame();
}
private function addCharacter():void{
trace("Adding the character");
if (!characterMC){
var myBorder:Rectangle = new Rectangle(35,35,600,480);
var myXY:Array = [38, 400];
var myChar:int = Math.ceil(Math.random()*3);
var myKeys:Array = [37,39,38,40];
var myDistance:int = myChar * 3;
characterMC = new Character(myBorder, myXY, myKeys, myChar, myDistance);
addChild(characterMC);
}
else{
characterMC.x = 38;
characterMC.y = 510;
characterMC.gotoAndStop(pSkill);
}
}
private function addItems():void{
trace("yeah boi");
var mySkill:int = Math.ceil(Math.random() *3);
var myMaxItems:int = mySkill + 5;
trace(mySkill);
trace(myMaxItems);
trace(this);
for (var i:int = 0; i < myMaxItems; i++){
var thisItem:Item = new Item(this, characterMC, mySkill);
thisItem.name = "item" + i;
cGameObjs.push(thisItem);
addChild(thisItem);
}
pSkill = mySkill;
updateScores();
}
private function addBots():void{
trace("adding the bots bra");
var myBorder:Rectangle = new Rectangle(100,100,400,350);
var mySkill:int = Math.ceil(Math.random()*3);
var myMaxBots:int = mySkill +10;
for (var i:int = 0; i < myMaxBots; i++){
var thisBot:Bot = new Bot(myBorder, characterMC, mySkill);
thisBot.name = "bot" + i;
cGameObjs.push(thisBot);
addChild(thisBot);
}
}
private function updateScores():void{
scoreDisplay.text = String(pScore);
itemsDisplay.text = String(pItems);
livesDisplay.text = String(pLives);
msgDisplay.text = "Orc Invasion";
}
public function updateLives(myBot:MovieClip):void{
trace("update lives");
pLives--;
pScore -= myBot.getPts();
var myIndex:int = cGameObjs.indexOf(myBot);
cGameObjs.splice(myIndex, 1);
if (pLives > 0){
updateScores();
}
else{
gameOver(false);
}
}
public function updateItems(myItem:MovieClip):void{
trace("update items");
pItems--;
pScore += myItem.getPts();
var myIndex:int = cGameObjs.indexOf(myItem);
cGameObjs.splice(myIndex, 1);
if (pItems > 0){
updateScores();
}
else{
gameOver(true);
}
}
private function gameOver(bool:Boolean):void{
trace("Game over dawg");
updateScores();
if(bool){
msgDisplay.text = "Good job buddy";
}
else{
msgDisplay.text = "You suck dawg";
}
removeLeftovers();
}
private function resetGame():void{
playAgainBtn.visible = false;
playAgainBtn.removeEventListener(MouseEvent.CLICK,playAgain);
cGameObjs = new Array();
addCharacter();
addItems();
addBots();
pLives = 5 - pSkill;
pScore = 0;
pItems = pSkill + 5;
updateScores();
}
private function playAgain(evt:MouseEvent):void{
resetGame();
}
private function removeLeftovers():void{
trace("Removing leftover items and bots");
for each(var myObj in cGameObjs){
myObj.hasHitMe();
myObj = null;
}
playAgainBtn.visible = true;
playAgainBtn.addEventListener(MouseEvent.CLICK, playAgain);
}
}
}
and this is the class where I am attempting to access this function within one of the other 3 classes:
package {
import flash.display.MovieClip;
import flash.events.*;
import ZombieBots;
public class Item extends MovieClip{
private var cNumItem:int;
private var cNumPts:int;
private var characterMC:MovieClip;
private var ZombieBot:ZombieBots;
public function Item(myZB:ZombieBots, myChar:MovieClip, mySkill:int=1) {
ZombieBot = myZB;
cNumItem = Math.ceil(Math.random() * (mySkill * 3 + 1));
characterMC = myChar;
this.addEventListener(Event.ADDED_TO_STAGE,initItem);
addEventListener(Event.ENTER_FRAME, checkCollision);
}
private function initItem(evt:Event):void{
this.gotoAndStop(cNumItem);
cNumPts = cNumItem * 25;
setPosition();
this.removeEventListener(Event.ADDED_TO_STAGE,initItem);
}
private function setPosition():void{
this.x = (Math.ceil(Math.random() * 10)*50);
this.y = (Math.ceil(Math.random()*10)*35);
}
private function checkCollision(evt:Event){
if (characterMC.hitTestObject(this)){
ZombieBot.updateItems(this);
hasHitMe();
}
}
public function hasHitMe():void{
trace("remove");
removeEventListener(Event.ENTER_FRAME, checkCollision);
this.parent.removeChild(this);
}
public function getPts():int{
return cNumPts;
}
}
}
can anyone help?

Answer 1

updateItems is not a MovieClip method. It's a method of your ZombieBots class.
Casting your ZombieBots instance (which I am assuming is root) as a MovieClip, will only allow you to use it's class methods or methods it has inherited.
Try this :
var zombieBotsInstance:ZombieBots = root as ZombieBots;
zombieBotsInstance.updateItems(this);