# Errors using document class and addChild

**URL:** https://forum.kirupa.com/t/errors-using-document-class-and-addchild/248604
**Category:** Uncategorized
**Created:** [January 10, 2008, 2:12am UTC](https://forum.kirupa.com/t/errors-using-document-class-and-addchild/248604 "2008-01-10T02:12:29Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### Author: ![jordanink](https://avatars.discourse-cdn.com/v4/letter/j/a9a28c/32.png) [@jordanink](https://forum.kirupa.com/u/jordanink)
#### Post date: [January 10, 2008, 2:12am UTC](https://forum.kirupa.com/t/errors-using-document-class-and-addchild/248604/1 "2008-01-10T02:12:29Z")

</div>

I am curently learning as3, and am trying to do a tutorial from the adobe site. Unfortunately the sample file on the site doesn’t seem to be the right one. and I keep getting three errors when I run it.

1180: Call to a possibly undefined method addFrameScript.  
1180: Call to a possibly undefined method addChild.  
5000: The class ‘Snowflake’ must subclass ‘flash.display.MovieClip’ since it is linked to a library symbol of that type.

What the tutorial is supposed to make is a snow effect. I am boggled by the 5000 error because I am not linking to any library symbols. There is nothing in the fla except a small line of code on frame 1 of the timeline.

snow.fla:

```auto

for(var i:uint; i<800; i++) {
	var SNOWFLAKE:Snowflake = new Snowflake();
	addChild(SNOWFLAKE);
}

```

I have the Document Class set as Snowflake in the properties bar.

Snowflake.as looks like this:

```auto

package {
    import flash.display.Shape;
    import flash.events.Event;
    import flash.filters.BlurFilter;

    public class Snowflake extends Shape {
        private var stageWidth:int = 550;
        private var stageHeight:int = 450;
        private var highestDropSpeed:uint = 16;
        private var dropSpeed:int = Math.round(Math.random() * Math.random() * highestDropSpeed);
        private var incrementer:int = Math.round(Math.random() * 100);
        private var shades:Array = [0xFFFFFF, 0xCCCCCC, 0x999999, 0x666666];
        private var windSpeed:int = 2;

        public function Snowflake() {
            graphics.beginFill(shades[Math.ceil(Math.random() * shades.length)]);
            graphics.drawCircle(0,0,4);
            graphics.endFill();

            filters = [new BlurFilter(1,dropSpeed,1)];
            addEventListener(Event.ENTER_FRAME,update); 
            reset();
        }
      
        private function reset():void {
            y = Math.random() * stageHeight * -1;
            x = Math.random() * stageWidth - (windSpeed*100);
            scaleX = scaleY = 0.25 + (Math.random() * Math.random() * 0.75);
        }

        private function update(e:Event):void {
            y += dropSpeed;
            x += windSpeed + Math.sin(incrementer/10) * (1/(dropSpeed/3));
            
            if (y > stageHeight) {
                reset();
            }

            incrementer++;
        }
    }
}

```

Any help would be great!