Hi, I am getting the following error using a nvd3-multi-bar-chart when I only have one column on the chart: Error: Invalid value for <text> attribute x="NaN" This is my HTML code: <nvd3-multi-bar-chart data="toChart" id="analysis" margin = "{left:50,top:20,bottom:45,right:50}" noData="{$ \'NO_ANALYSIS_DATA\' | translate $}" objectEquality="true" transitionduration="0" showxaxis="true" showyaxis="true" interactive="true" tooltips="true" delay="0" color="colorFunction()" rotateLabels="80" tooltipcontent="toolTipContentFunction()"> <svg></svg> </nvd3-multi-bar-chart> My chart values are defined has: $scope.toChart = [ { "id" : 0, "key" : "Series 1", "values" : [ ["A", 10] ] } ] Is this a bug? Or a chart with one column is a specific case? Thanks