Tweening error

[Jezzamon]

Hey... I'm having some trouble wit a tween in my movie...

What I want the tween to do is that when it's finished, repeat the loop in the opposite direction.

As far as I can see, this should work, although when I try it I get this error:

TypeError: Error #1009: Cannot access a property or method of a null object reference.
at AnotherMazeGame_fla::MainTimeline/Tween8aHandler()
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at fl.transitions::Tween/set time()
at fl.transitions::Tween/nextFrame()
at fl.transitions::Tween/onEnterFrame()

Can anyone help?

var tween8a:Tween=new Tween(motion8a_mov, "x", Regular.easeInOut, 67.3, 480.3, 168, false);
var tween8b:Tween=new Tween(motion8b_mov, "x", Regular.easeInOut, 480.3, 67.3, 168, false);

tween8a.addEventListener(fl.transitions.TweenEvent.MOTION_FINISH, Tween8aHandler);
tween8b.addEventListener(fl.transitions.TweenEvent.MOTION_FINISH, Tween8bHandler);

function Tween8aHandler(e:fl.transitions.TweenEvent):void{
	if(motion8a_mov.x<=67.3){
		tween8a.start();
	}
	else if(motion8a_mov.x>=480.3){
		tween8a.yoyo();
	}
}
function Tween8bHandler(e:fl.transitions.TweenEvent):void{
	if(motion8b_mov.x>=480.3){
		tween8b.start();
	}
	else if(motion8b_mov.x<=67.3){
		tween8b.yoyo();
	}
}

[cancerinform]

This should work, if motion8a_mov is not null.

import fl.transitions.*;
import fl.transitions.easing.*;

var tween8a:Tween = new Tween(motion8a_mov,"x",Regular.easeInOut,67.3,480.3,168,false);
var tween8b:Tween = new Tween(motion8b_mov,"x",Regular.easeInOut,480.3,67.3,168,false);

tween8a.addEventListener (TweenEvent.MOTION_FINISH, Tween8aHandler);
tween8b.addEventListener (TweenEvent.MOTION_FINISH, Tween8bHandler);

function Tween8aHandler (e:TweenEvent):void
{
    if (motion8a_mov.x <= 67.3)
    {
        tween8a.start ();
    }
    else if (motion8a_mov.x>=480.3)
    {
        tween8a.yoyo ();
    }
}
function Tween8bHandler (e:TweenEvent):void
{
    if (motion8b_mov.x >= 480.3)
    {
        tween8b.start ();
    }
    else if (motion8b_mov.x<=67.3)
    {
        tween8b.yoyo ();
    }
} 

Import all classes only once.

[Jezzamon]

I've tried that code but I get the same error...

What happens in the movie is the tween plays once, then reverses, but then instead of replaying the tween, it jumps to reversing again, and continues to reverse instead of going back and forth.

The actual error pops up when the movie goes back to the first frame of the movie (this script is at fram 96).

It's possible that it isn't as much tween error as I thought.

[cancerinform]

It works for me but only when tested in one frame. Do you have a script in frame 1?

[Jezzamon]

no, the script is at frame 96...