BabylonJS Dynamically generated Animation not playing

I’m developing a custom AnimationSequencer Class that, once provided with a group of keyframes, is able to dynamically generate an Animation instance for each keyframe group, append these animations to an an AnimationGroup and finally play the animation group on a call to the “playAll()” method. Here is the playground: https://playground.babylonjs.com/#7QN6ZM#54 On running the application, if you navigate the the developer tools, console window you will note the following error trace; its seems there is an issue with passing the Babylon scene to a JS class and then attempting to play animation from within the context of a JS class.

Curiously, as noted in the playground, everything works as expected when I attempt the process directly, (i.e non-dynamically and without use of the custom AnimationSequencer class) from a first class function.

I've found the source of the error. It was an oversight on my part; where an animation has been declared to update the position attribute then the data type must be also specified as a Vector3:

 let meshPositionAnim = new BABYLON.Animation(
    meshAnimSequence.objectId+"MeshPositionAnimation",
    "position",
    this.defaultFPS,
    BABYLON.Animation.ANIMATIONTYPE_VECTOR3,   //Must be ANIMATIONTYPE_VECTOR3
    BABYLON.Animation.ANIMATIONLOOPMODE_CONSTANT,
    true
    );

I had been erroneously using BABYLON.Animation.ANIMATIONTYPE_FLOAT before now as I had been animating each axis independently prior, using position.x,position.y and position.z respectively (which are float values), rather than just position.