[away3d] Collada Object Loading

[Dona]

Hi,

I was trying to load a collada object.But it throws an error

TypeError: Error #1009: Cannot access a property or method of a null
object reference.
        at away3d.loaders::Loader3D/loadTextures()
        at away3d.loaders::Loader3D/onGeometryComplete()
        at flash.events::EventDispatcher/dispatchEventFunction()
        at flash.events::EventDispatcher/dispatchEvent()
        at flash.net::URLLoader/onComplete()

My code :
                        var collada : Collada = new Collada();
                        var loader:Loader3D = new Loader3D();
                        loader.addEventListener(Loader3DEvent.LOAD_SUCCESS, 
onLoadCollada);
 
loader.addEventListener(Loader3DEvent.LOAD_ERROR, onErrorCollada);
                        loader.loadGeometry("puma_run.dae",collada);
                        scene.addChild(loader);

I've used away3D 3.6.1v.


Thank You