# Warning 1090?

**URL:** <https://forum.kirupa.com/t/warning-1090/244273>\
**Category:** Uncategorized\
**Created:** [November 15, 2007, 8:13pm UTC](https://forum.kirupa.com/t/warning-1090/244273 "2007-11-15T20:13:14Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![453\_0](https://avatars.discourse-cdn.com/v4/letter/4/dec6dc/32.png) [@453\_0](https://forum.kirupa.com/u/453_0)\
**Post date:** [November 15, 2007, 8:13pm UTC](https://forum.kirupa.com/t/warning-1090/244273/1 "2007-11-15T20:13:14Z")

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I’m having the following warning, I’m not really sure if it has any bad effect on my animations or if it matters but it would be really nice if I could fix it somehow:  
[COLOR=DarkOrange]  
[COLOR=Red]Warning: 1090: Migration issue: The onEnterFrame is not triggered automatically by Flash Player at run time in ActionScript 3.0. You must first register this handler for the event using addEventListener ( ‘enterFrame’, callback\_handler).[/COLOR][/COLOR]

Could someone explain why am I getting that warning ?

If this helps, I’m just playing around in AS 3.0, here’s the code ( a class ):

```auto
package {
    
    import flash.display.Sprite;
    import flash.events.Event;
    
    public class FirstAnimation extends Sprite {
        private var ball:Sprite;
        
        public function FirstAnimation() {
            init();
        }
        private function init():void {
            ball = new Sprite;
            addChild(ball);
            ball.graphics.beginFill(0xFF0000);
            ball.graphics.drawCircle(0, 0, 40);
            ball.graphics.endFill();
            ball.x = 20;
            ball.y = stage.stageHeight / 2;
            ball.addEventListener(Event.ENTER_FRAME, onEnterFrame);
        }
        private function onEnterFrame(event:Event):void {
            ball.x++;
        }
    }
}

```

Thanks.