Error 1109

[adobe5610]

I've ran it before and it works. Then suddenly it didn't. 

Code: 

import flash.events.Event;
import flash.filters.*;

stop();

//////////////////////Filters///////////////////////
var permGlow:GlowFilter = new GlowFilter();
permGlow.alpha = .5;
permGlow.color = 0xffffff;
permGlow.blurX = 10;
permGlow.blurY = 10;
Journal1.filters = [permGlow];
Journal2.filters = [permGlow];
Journal3.filters = [permGlow];

var myGlow:GlowFilter = new GlowFilter();
myGlow.alpha = 1;
myGlow.color = 0xffffff;
myGlow.blurX = 50;
myGlow.blurY = 50;

//////////////////////Circular Path//////////////////
var angle:Number = 0;
var radius:Number = 170;

var center:Number = 266;
var centery:Number = 140;

stage.addEventListener(Event.ENTER_FRAME,spin);
function spin(e:Event):void
{
Journal1.x = center + Math.sin(angle - 500) * radius;
Journal1.y = centery + Math.cos(angle - 500) * radius;

Journal2.x = center + Math.sin(angle - 100) * radius;
Journal2.y = centery + Math.cos(angle - 100) * radius;

Journal3.x = center + Math.sin(angle + 300) * radius;
Journal3.y = centery + Math.cos(angle + 300) * radius;

angle += .02;
}
////////////////////////Button Click///////////////////////
Journal1.addEventListener(MouseEvent.CLICK, jump_char);
function jump_char(e:MouseEvent):void
{
gotoAndPlay(2);
}

Journal2.addEventListener(MouseEvent.CLICK, jump_place);
function jump_place(e:MouseEvent):void
{
gotoAndPlay(3);
}

Journal3.addEventListener(MouseEvent.CLICK, jump_monster);
function jump_monster(e:MouseEvent):void
{
gotoAndPlay(4);
}
//////////////////////////Hover//////////////////////////
Journal1.addEventListener(MouseEvent.MOUSE_OVER, glow1);
function glow1(e:MouseEvent):void
{
Journal1.filters = [myGlow];
Journal1.addEventListener(MouseEvent.MOUSE_OUT, closeglow);
}

Journal2.addEventListener(MouseEvent.MOUSE_OVER, glow2);
function glow2(e:MouseEvent):void
{
Journal2.filters = [myGlow];
Journal2.addEventListener(MouseEvent.MOUSE_OUT, closeglow);
}

Journal3.addEventListener(MouseEvent.MOUSE_OVER, glow3);
function glow3(e:MouseEvent):void
{
Journal3.filters = [myGlow];
Journal3.addEventListener(MouseEvent.MOUSE_OUT, closeglow);
}
//////////////////////Off Hover/////////////////////////
function closeglow(e:MouseEvent):void
{
Journal1.filters = [permGlow];
Journal2.filters = [permGlow];
Journal3.filters = [permGlow];
}

Error:

TypeError: Error #1009: Cannot access a property or method of a null object reference. at GravityFalls_fla::MainTimeline/spin()

[adobe5610]

I figured it out.

[adobe5610]

Have to properly remove the stage event before going to next frame.

[Zync]

null object reference usually means something on your stage might have gotten deleted. So while the code might not have changes, something on your stage might have. Maybe check to see if anything has been removed or instance renamed?