Line 45 1120: Access of undefined property releaseFood

use:

package      {           import flash.display.MovieClip;           import flash.events.*;           import flash.display.Stage;           public class Main extends MovieClip           {                public static  var shooter:Artillery;                public static var circle: Circle;                public static var hungered: Hungered;                public static var food: Food;                public static var level:int = 0;                public static var stage:Stage                public function Main()                {                     StartGame(level);                }                public function StartGame(level:int):void                {                     circle = new Circle(level);                     addChild(circle);                     hungered = new Hungered();                     addChild(hungered);                     shooter  =new Artillery();                     addChild(shooter);                     stage.addEventListener(MouseEvent.CLICK,releaseFood)                } // this could and/or should be private                public  function releaseFood(e:MouseEvent):void                {                     food = new Food();                     addChild(food)                } // this could and/or should be private                public function StopGame():void                {                     circle.parent.removeChild(circle);                          hungered.parent.removeChild(hungered);                     shooter.parent.removeChild(shooter);                     food.parent.removeChild(food);                           stage.addEventListener(MouseEvent.CLICK,releaseFood)                     trace("stop")                }           }      }