Bullet MicroChart delta mode in sapui5 is throwing an error?

Hi,

I tried to bring a bullet chart in delta mode it is throwing an error "Uncaught TypeError: Cannot read property 'Delta' of undefined"

code of the chart is

var bars =  new sap.suite.ui.commons.BulletChartData({

         value : 10,

         color : sap.suite.ui.commons.InfoTileValueColor.Error,

       });

         var bars1 =  new sap.suite.ui.commons.BulletChartData({

         value : 20,

         color : sap.suite.ui.commons.InfoTileValueColor.Good,

       });

         var bars2 =  new sap.suite.ui.commons.BulletChartData({

         value : 39,

         color : sap.suite.ui.commons.InfoTileValueColor.Error,

       });

          var bulls =  new sap.suite.ui.commons.BulletChart("x",{

         size : sap.suite.ui.commons.InfoTileSize.Auto,

         color : sap.suite.ui.commons.InfoTileValueColor.Error,

         actual :[bars],

         thresholds : [bars2,bars1],

         targetValue : 18,

         forecastValue: 20,

         mode : sap.suite.ui.commons.BulletChartMode.Delta,

         showDeltaValue : true,

         showValueMarker :false,

         targetValueLabel : "18",

         actualvalueLabel : "10",

         minValue : 0,

         maxValue : 40,

       });