How to add texture to 3D obj in Entity element in qml in Qt 5.5?

[Neeraja]

The following code snippet shows how I have tried to add texture to the .obj file.
This is the error message:
Texture data is null, texture data failed to load

Entity {
property Material materialSpeedometer: PMaterial{}
components: [
Mesh {
source: "assets/obj/speedmeter3.obj"

         PMaterial {
            effect: shadowMapEffectDB
           ambientLight: "blue"
            specularColor: Qt.rgba(0.2, 0.2, 0.2, 1.0)
            diffuseMap: "C:/Qt/Qt5.5.0/Examples/Qt-5.5/qt3d/exampleresources/assets/obj/Speedometer_01.JPG"
            normalMap: "C:/Qt/Qt5.5.0/Examples/Qt-5.5/qt3d/exampleresources/assets/obj/Speedometer_01.JPG"
           shininess: shininessSpecularMap
        }


    ]

}

PS: PMaterial is a separate qml defining different Material Parameters.

Please describe the correct way to load texture .
Thanks.