ModelParticle3D - 3D particles not visible

Output error and unable to configure ModelParticle3D correctly to view 3D cubes as particles.  SpriteParticle3D renders correctly and w/o issue

App Output message
-  QQmlEngine::setContextForObject(): Object already has a QQmlContext
-  8:17: Unable to assign QQuick3DModel to QQmlComponent

 

View3D {
id: view3D
anchors.fill: parent
SceneEnvironment

{ id: sceneEnvironment antialiasingMode: SceneEnvironment.MSAA antialiasingQuality: SceneEnvironment.High }

DirectionalLight

{ id: directionalLight x: 0 y: 0 z: 290.18155 }

}
Node {
id: scene

PerspectiveCamera

{   id: camera x: 0 y: 63 eulerRotation.x: -8 fieldOfView: 25 z: 190.34 }

Model {
id: cubeParticle3D
source: "#Cube"
scale.z: 0.2
scale.y: 0.2
scale.x: 0.2
DefaultMaterial

{ id: cubeMaterial diffuseColor: "#55ada5" }

materials: cubeMaterial

}
ParticleSystem3D {
id: particleSystem
eulerRotation.z: -0.0001
eulerRotation.y: 0.00009
eulerRotation.x: -84.40091

//SpriteParticle3D {
//id: spriteParticle
//color: "#8b1515"
//sprite: particleSystem
//particleScale: 1
//maxAmount: 15000

// Texture

{ // id: textureLaser // source: "images/laserGraphic.svg" // }

}

ModelParticle3D

{id: modelParticle // maxAmount: 15000 // delegate: cubeParticle3D // }

 

ParticleEmitter3D {
id: emitter
particleScale: 5
system: particleSystem
emitRate: 61
lifeSpan: 2500
particle: modelParticle
velocity: VectorDirection3D

{ id: vectorDirection directionVariation.z: 15 directionVariation.y: 17 directionVariation.x: 15 direction.y: 149 }

particleRotationVariation: Qt.vector3d(0,0,180)
particleRotationVelocityVariation: Qt.vector3d(100,0,100)
}

Gravity3D

{ id: gravity direction.y: 5 magnitude: -100 }

}

}

}