AddChild and removeChild in ActionScript 3 does not work properly

I am wondering that why I get Error #1009: Cannot access a property or method of a null object reference by using removeChild() function in my as3 code which is as following:

public class MyGame extends MovieClip{

    private var myMovieClip:MovieClip;

    public function add():void{
        myMovieClip = new MyMovieClip();
        addChild(myMovieClip);
    }

    public function remo开发者_如何学运维ve():void{
        removeChild(myMovieClip);
    }

}

in the remove function, I wanna remove myMovieClip object and then create a new one and use it for continuing of my application.

Any idea will be appreciated Thanks

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It appears that myMovieClip is null at the time you are calling remove...

This might be a little safer

function DetachFromParent(mc:MovieClip):void
{
   if(mc!= null && mc.parent != null)
   {
       mc.parent.removeChild(mc);
   }
}

---

You need to check if you even need to remove myMovieClip:

public function remove():void{
    if(myMovieClip) // myMovieClip is not null or undefined, remvove it
        removeChild(myMovieClip);
}