[away3d] Path Animator updatePosition - end is null

[cellis]

Hello,

I am trying to path-animate an object ( i tried several types of
objects so i'm pretty sure the problem is in my path data )

Here is what i am doing

//initialise scene,private variables etc

setupAnimator
{
                        var colorCodeSpheres:Array =
                        [
                                "red",
                                "pink",
                                "orange",
                                "yellow"
                        ]

                        var aPath:Array =
                        [
                                new Number3D( -5000, -5000, -10000),
                                new Number3D( -5000, 5, 5),
                                new Number3D( 5000, 5, 5),
                                new Number3D( -5000, -4000, -10000)
                        ]
                        var p:Path = new Path(aPath);

                        var n:Number3D;
                        for (var i = 0; i < aPath.length;i++)
                        {

                                n = Number3D(aPath[i]);
                                this.view.scene.addChild(
                                 new Sphere(
                                                        { x:n.x,
y:n.y, z:n.z, material:new ColorMaterial(colorCodeSpheres[i]) }
                                                  ));
                        }


                        var animInit:Object =
                        {
                                duration:5000,
                                lookat:false,
                                aligntopath:true,
                                targetobject:null,
                                offset:new Number3D(0, 100, 0),
                                rotations:null,
                                fps:30,
                                easein:false,
                                easeout:false
                        }

                        this.testCube = new Cube( { material:new
WireframeMaterial("red#purple"), height:500, width:500, depth:500 } );
                        this.view.scene.addChild(this.testCube);
                        this.pathanimator = new PathAnimator(p, 
this.testCube,animInit);
                }
}

onEnterFrame ()
{
                        if(pathanimator)
                        {
                                this.pathAnimTime = (this.pathAnimTime 
+0.001>1)? 0 :
this.pathAnimTime+0.001;
                                this.pathanimator.update(this.pathAnimTime);
                        }
//at pathAnimTime = 499.000 (the 3rd Point in the path) :
//TypeError: Error #1009: Cannot access a property or method of a null
object reference.
//      at away3d.animators::PathAnimator/::updatePosition()
//      at away3d.animators::PathAnimator/update()
//      at ColladaAnimation/::onEnterFrame()
}

I tried debugging it, and it appears that the end variable of the
curve is null, but i am confused as to why.

Any help greatly appreciated!