Bug: Grouped sensors graph js error

1. I am creating new grouped sensors chart. Choosing 2 temp sensors. They both are displayed fine on two separate graphs
2. Grouped sensors char is not displayed because of JS error.

Error TypeError: Cannot read property 'length' of undefined at SVGGElement.<anonymous> (nv.d3.js:5712) at d3.min.js:3 at H (d3.min.js:1) at Array.ka.each (d3.min.js:3) at SVGGElement.<anonymous> (nv.d3.js:5710) at d3.min.js:3 at H (d3.min.js:1) at Array.ka.each (d3.min.js:3) at Array.b (nv.d3.js:5556) at Array.ka.call (d3.min.js:3)

Data /mc/rest/metrics/metricsData?chartType=lineChart&timestampFrom=1457758273944&variableId=50&variableId=53

[ { "unit" : "°C", "timeFormat" : "hh:mm:ss a", "chartType" : "lineChart", "chartInterpolate" : "linear", "chartData" : [ { "values" : [ [ 1457758285424, 22.9 ], [ 1457758405424, 22.9 ], [ 1457758465424, 22.9 ], [ 1457758525424, 22.8 ], [ 1457758585424, 22.8 ], [ 1457758645424, 22.9 ], [ 1457758765424, 22.8 ], [ 1457758885424, 22.8 ], [ 1457758945424, 22.8 ], [ 1457759005424, 22.8 ], [ 1457759125424, 22.8 ], [ 1457759185424, 22.8 ], [ 1457759305424, 22.8 ], [ 1457759365424, 22.8 ], [ 1457759425424, 22.8 ], [ 1457759485424, 22.8 ], [ 1457759545424, 22.8 ], [ 1457759665424, 22.8 ], [ 1457759725424, 22.8 ], [ 1457759845424, 22.8 ], [ 1457759905424, 22.8 ], [ 1457759965424, 22.8 ], [ 1457760025424, 22.8 ], [ 1457760145424, 22.8 ], [ 1457760205424, 22.7 ], [ 1457760265424, 22.8 ], [ 1457760325424, 22.8 ], [ 1457760445424, 22.8 ], [ 1457760565424, 22.8 ], [ 1457760625424, 22.7 ], [ 1457760685424, 22.7 ], [ 1457760745424, 22.8 ], [ 1457760805424, 22.7 ], [ 1457760865424, 22.7 ], [ 1457760925424, 22.8 ], [ 1457760985424, 22.7 ], [ 1457761105424, 22.7 ], [ 1457761165424, 22.7 ], [ 1457761285424, 22.7 ], [ 1457761345424, 22.7 ], [ 1457761405424, 22.7 ], [ 1457761465424, 22.7 ], [ 1457761525424, 22.7 ], [ 1457761585424, 22.7 ], [ 1457761645424, 22.7 ], [ 1457761765424, 22.7 ] ] }, { "values" : [ [ 1457758705424, 19.3 ], [ 1457759185424, 19.3 ], [ 1457759545424, 19.2 ], [ 1457759905424, 19.2 ], [ 1457759965424, 19.2 ], [ 1457760205424, 19.1 ], [ 1457760265424, 19.1 ], [ 1457761105424, 19.3 ], [ 1457761165424, 19.2 ], [ 1457761225424, 19.2 ], [ 1457761285424, 19.1 ] ] } ] } ]

Screenshot

JFYI: Of of these sensors (id = 50) getting this data for single chart (values for whole day). And graph is displayed on the page: [ { "id" : 50, "variableType" : "Temperature", "unit" : "°C", "dataType" : "Double", "timeFormat" : "hh:mm:ss a", "resourceName" : "[G]:rpi2 >> [N]:1:null >> [S]:1:null >> [SV]:Temperature", "chartType" : "lineChart", "chartInterpolate" : "linear", "chartData" : [ { "key" : "Average", "values" : [ [ 1457676025424, 21.7 ], [ 1457676325424, 21.7 ], [ 1457676625424, 21.7 ], [ 1457676925424, 21.7 ], [ 1457677225424, 21.725 ], [ 1457677525424, 21.8 ], [ 1457677825424, 21.8 ], [ 1457678125424, 21.8 ], [ 1457678425424, 21.8 ], [ 1457678725424, 21.8 ], [ 1457679025424, 21.8 ], [ 1457679325424, 21.8 ], [ 1457679625424, 21.833 ], [ 1457679925424, 21.8 ], [ 1457680225424, 21.85 ], [ 1457680525424, 21.825 ], [ 1457680825424, 21.867 ], [ 1457681125424, 21.82 ], [ 1457681425424, 21.867 ], [ 1457681725424, 21.85 ], [ 1457682025424, 21.875 ], [ 1457682325424, 21.85 ], [ 1457682625424, 21.86 ], [ 1457682925424, 21.833 ], [ 1457683225424, 21.85 ], [ 1457683525424, 21.84 ], [ 1457683825424, 21.85 ], [ 1457684125424, 21.82 ], [ 1457684425424, 21.8 ], [ 1457684725424, 21.8 ], [ 1457685025424, 21.8 ], [ 1457685325424, 21.8 ], [ 1457685625424, 21.8 ], [ 1457685925424, 21.8 ], [ 1457686225424, 21.8 ], [ 1457686525424, 21.8 ], [ 1457686825424, 21.8 ], [ 1457687125424, 21.8 ], [ 1457687425424, 21.8 ], [ 1457687725424, 21.8 ], [ 1457688025424, 21.8 ], [ 1457688325424, 21.8 ], [ 1457688625424, 21.8 ], [ 1457688925424, 21.8 ], [ 1457689225424, 21.8 ], [ 1457689525424, 21.8 ], [ 1457689825424, 21.8 ], [ 1457690125424, 21.8 ], [ 1457690425424, 21.8 ], [ 1457690725424, 21.8 ], [ 1457691025424, 21.8 ], [ 1457691325424, 21.775 ], [ 1457691625424, 21.767 ], [ 1457691925424, 21.767 ], [ 1457692225424, 21.8 ], [ 1457692525424, 21.733 ], [ 1457692825424, 21.8 ], [ 1457693125424, 21.767 ], [ 1457693425424, 21.8 ], [ 1457693725424, 21.767 ], [ 1457694025424, 21.8 ], [ 1457694325424, 21.8 ], [ 1457694625424, 21.8 ], [ 1457694925424, 21.75 ], [ 1457695225424, 21.8 ], [ 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[manusovich]

Works! 😃 Thank you!

[jkandasa]

@manusovich can you check now and update?