高图表（火花线）显示＆＃34;使用高图表创建4.0.1无数据显示＆＃34;而不是显示图？

Question

高图表（火花线）显示Created with High charts 4.0.1 No data to display而不是显示图形？

title: {
    text: ''
},
credits: {
enabled: false
},
xAxis: {
    lineWidth: 0,
    minorGridLineWidth: 0,
    lineColor: 'transparent',
    gridLineColor: 'transparent',
    min: 0,
    title: {
        text: ''
    },
    categories: ['a','b','c']
},
yAxis: [{
    lineWidth: 0,
    minorGridLineWidth: 0,
    lineColor: 'transparent',
    gridLineColor: 'transparent',


    title: {
        text: ''
    },
    labels:
    {
        enabled: false
    }
},
{
    lineWidth: 0,
    minorGridLineWidth: 0,
    lineColor: 'transparent',
    gridLineColor: 'transparent',

    title: {
        text: ''
    },
    labels:
    {
        enabled: false
    }
}],
series: [{
    name: ' ',
    yAxis: 1,
    type: 'spline',
    data: [1,2,3],
    pointStart: 0
},
{
    name: ' ',
    yAxis: 1,
    type: 'spline',
    data: [4,5,6],
    pointStart: 0
}],
legend: {
    enabled: false,
    width: 100,
    floating: true,
    align: 'left',
    x: 0, // = marginLeft - default spacingLeft
    itemWidth: 60
},
chart: {
    height: 30,
    width: 100,
    marginBottom: 10
},
tooltip: {
    positioner: function () {
        return { x: -180, y: -25 };
    },
    shape: "square",
    backgroundColor: '#FCE9CE',
    borderWidth: 1,
    borderColor: '#F90',
    formatter: function () {
        var bpValue = [];
        var serviceDate;
        $.each(this.points, function (i, point) {
            bpValue.push('<span>' + point.y + '</span>');
            serviceDate = point.x;
        });
        var content = "<span><b>Service:</b>" + serviceDate 
            + "</span><br /><span><b>BP Value :</b></span>";
        bpValue = bpValue.join('/');
        return content + bpValue;
    },
    shared: true
}

有时它不显示任何行或点。而不仅仅是显示Created with Highcharts 4.0.1的替代文字。会是什么问题？怎么解决这个问题？