v3d.js:132 v3d.PropertyBinding: Can not bind to objectName of node undefined.

<template color="green">
    <dummy>
        <label>绘制一条线段:</label>
        <label>名称为:</label>
        <text name="name">myLine</text>

        <label>起点位置</label>
        <label>X:</label>
        <number name="startX"></number>
        <label>y:</label>
        <number name="startY"></number>
        <label>z:</label>
        <number name="startZ"></number>

        <label>终点为:</label>
         <label>X:</label>
        <number name="endX"></number>
         <label>y:</label>
        <number name="endY"></number>
         <label>z:</label>
        <number name="endZ"></number>
         <label>颜色为:</label>
        <color  name="myColor"></color>

    </dummy>
</template>

<script>
function code(block) {
     const startX = <code>'${block.getFieldValue('startX')}'</code>;
     const startY = <code>'${block.getFieldValue('startY')}'</code>;
     const startZ = <code>'${block.getFieldValue('startZ')}'</code>;

     const endX = <code>'${block.getFieldValue('endX')}'</code>;
     const endY = <code>'${block.getFieldValue('endY')}'</code>;
     const endZ = <code>'${block.getFieldValue('endZ')}'</code>;

     const myColor = <code>'${block.getFieldValue('myColor')||'#660000'}'</code>;
     

    const fun = Plug.provide('myFunction1', function(startX, myColor,) {
      
        var times = [0, 10];

        var position_x = [0, 0, 0, 100, 0, 0];

        var pos1_Keyframe = new v3d.KeyframeTrack('.mesh[car].position', times, position_x);

        var duration = 10;

        var clip = new v3d.AnimationClip('boxAnimation', duration, [
            pos1_Keyframe
        ]);
   

        var mixer = new THREE.AnimationMixer(app.scene);
        var action = mixer.clipAction(clip);
        app.actions.push(action);
        console.log("====================app.actions")
        console.log(app.actions);
     

    

    });
    return <code>${fun}(${startX}, ${myColor});</code>;        
}
</script>

I want create my Animation,How can I binding the mesh “car” with Animation?I sure ,the “car” is mesh in app.scene