Error: Can not find series on the chart

[Bhushan_Sure]

It is running properly, But when i am closing application this error is coming , Can anybody tell why this error is coming.

ChartView
    {
        id:chrt
        height: parent.height/2
        width: parent.width+18.5
        x:-9.2
        antialiasing: true
        legend.visible: false
        backgroundRoundness: 0
        margins.top: 20
        margins.bottom: 1
        margins.left: 1
        margins.right: 1
        backgroundColor: "black"

        ValueAxis
        {
            id:x_axis
            min: 0
            max: 50
            tickCount: 6
            visible: false
        }

        ValueAxis
        {
            id:y_axis
            min: 0
            max: 5
            tickCount: 6
            visible: false
        }

        ValueAxis
        {
            id:y_axis_right
            min: 0
            max: 5
            tickCount: 6
            visible: false
        }

        LineSeries
        {
            id:l1
            axisX: x_axis
            axisY: y_axis
            color: "#969FB2"
            width: 3.5
            XYPoint { x: x_variable_chrt_1+0; y: y_variable_chrt_1+0 }
            XYPoint { x: x_variable_chrt_1+0; y: y_variable_chrt_1+5 }
            XYPoint { x: x_variable_chrt_1+50; y: y_variable_chrt_1+5 }
            XYPoint { x: x_variable_chrt_1+50; y: y_variable_chrt_1+0 }
            XYPoint { x: x_variable_chrt_1+0; y: y_variable_chrt_1+0 }
        }

        LineSeries
        {
            id:l2
            axisX: x_axis
            axisY: y_axis
            color: "#969FB2"
            width: 2
            XYPoint { x: x_variable_chrt_1+10; y: y_variable_chrt_1+5 }
            XYPoint { x: x_variable_chrt_1+10; y: y_variable_chrt_1+0 }
            XYPoint { x: x_variable_chrt_1+20; y: y_variable_chrt_1+0 }
            XYPoint { x: x_variable_chrt_1+20; y: y_variable_chrt_1+5 }
            XYPoint { x: x_variable_chrt_1+30; y: y_variable_chrt_1+5 }
            XYPoint { x: x_variable_chrt_1+30; y: y_variable_chrt_1+0 }
            XYPoint { x: x_variable_chrt_1+40; y: y_variable_chrt_1+0 }
            XYPoint { x: x_variable_chrt_1+40; y: y_variable_chrt_1+5 }
            XYPoint { x: x_variable_chrt_1+50; y: y_variable_chrt_1+5 }
        }

        LineSeries
        {
            id:l3
            axisX: x_axis
            axisY: y_axis
            color: "#969FB2"
            XYPoint { x: x_variable_chrt_1+50; y: y_variable_chrt_1+3.34 }
            XYPoint { x: x_variable_chrt_1+0; y: y_variable_chrt_1+3.34 }
            XYPoint { x: x_variable_chrt_1+0; y: y_variable_chrt_1+1.67 }
            XYPoint { x: x_variable_chrt_1+50; y: y_variable_chrt_1+1.67 }
            style: Qt.DotLine
        }
    }

    // ChartView 2
    ChartView
    {
        id:chrt2
        height: parent.height/2
        width: parent.width+18.5
        x:-9.2
        antialiasing: true
        anchors.top: chrt.bottom
        legend.visible: false
        backgroundRoundness: 0
        margins.top: 15
        margins.bottom: 1
        margins.left: 1
        margins.right: 1
        backgroundColor: "black"

        ValueAxis
        {
            id:x_axis_2
            min: 0
            max: 50
            tickCount: 6
            visible: false
        }

        ValueAxis
        {
            id:y_axis_2
            min: 0
            max: 5
            tickCount: 6
            visible: false
        }

        ValueAxis
        {
            id:y_axis_right_2
            min: 0
            max: 5
            tickCount: 6
            visible: false
        }

        LineSeries
        {
            id:l1_2
            axisX: x_axis
            axisY: y_axis
            color: "#969FB2"
            width: 3.5
            XYPoint { x: x_variable_chrt_1+0; y: y_variable_chrt_1+0 }
            XYPoint { x: x_variable_chrt_1+0; y: y_variable_chrt_1+5 }
            XYPoint { x: x_variable_chrt_1+50; y: y_variable_chrt_1+5 }
            XYPoint { x: x_variable_chrt_1+50; y: y_variable_chrt_1+0 }
            XYPoint { x: x_variable_chrt_1+0; y: y_variable_chrt_1+0 }
        }

        LineSeries
        {
            id:l2_2
            axisX: x_axis
            axisY: y_axis
            color: "#969FB2"
            width: 2
            XYPoint { x: x_variable_chrt_1+10; y: y_variable_chrt_1+5 }
            XYPoint { x: x_variable_chrt_1+10; y: y_variable_chrt_1+0 }
            XYPoint { x: x_variable_chrt_1+20; y: y_variable_chrt_1+0 }
            XYPoint { x: x_variable_chrt_1+20; y: y_variable_chrt_1+5 }
            XYPoint { x: x_variable_chrt_1+30; y: y_variable_chrt_1+5 }
            XYPoint { x: x_variable_chrt_1+30; y: y_variable_chrt_1+0 }
            XYPoint { x: x_variable_chrt_1+40; y: y_variable_chrt_1+0 }
            XYPoint { x: x_variable_chrt_1+40; y: y_variable_chrt_1+5 }
            XYPoint { x: x_variable_chrt_1+50; y: y_variable_chrt_1+5 }
        }

        LineSeries
        {
            id:l3_2
            axisX: x_axis
            axisY: y_axis
            color: "#969FB2"
            XYPoint { x: x_variable_chrt_1+50; y: y_variable_chrt_1+3.34 }
            XYPoint { x: x_variable_chrt_1+0; y: y_variable_chrt_1+3.34 }
            XYPoint { x: x_variable_chrt_1+0; y: y_variable_chrt_1+1.67 }
            XYPoint { x: x_variable_chrt_1+50; y: y_variable_chrt_1+1.67 }
            style: Qt.DotLine
        }
    }

[Bhushan_Sure]

@Bhushan_Sure
In this above code, there are more than one chartview component in one qml.
I separated chartview in different qml and tried to load this different qml files into one, so i didn't got this error.

If anyone got same issue in future, try using loader component and define chartview in different different qml files.