Chart style 'Candlestick': Error on calling 'OnRender' method: SharpDX.SharpDXExcepti

[MicroTrends]

http://screencast.com/t/3tPtxtxDm

2015-05-08 15:12:27:736 Cbi.Instrument.RequestBars (to Provider): instrument='YM 06-15' from='05/08/2015 15:00:00' to='05/08/2015 23:59:59' period='1 Tick'
2015-05-08 15:12:28:188 ERROR: Chart style 'Candlestick': Error on calling 'OnRender' method: SharpDX.SharpDXException: HRESULT: [0xFB8C6408], Module: [Unknown], ApiCode: [Unknown/Unknown], Message: Unknown at SharpDX.Result.CheckError() at SharpDX.DirectWrite.TextLayout.GetMetrics(TextMetr ics& textMetrics) at NinjaTrader.NinjaScript.ChartStyles.ChartStyle.Dra wExecutionArrow(ChartControl chartControl, ChartBars chartBars, ChartScale chartScale, Execution execution, Dictionary`2 bar2Executions, Single x, Int32 idx) at NinjaTrader.NinjaScript.ChartStyles.ChartStyle.Ren derTrades(ChartControl chartControl, ChartScale chartScale, ChartBars chartBars) at NinjaTrader.NinjaScript.ChartStyles.ChartStyle.Ren der(RenderTarget pRenderTarget, ChartControl chartControl, ChartScale chartScale, ChartBars chartBars)
2015-05-08 15:12:29:506 ERROR: Chart rendering failed. There is likely a problem with a chart object's OnRender method. D2D error = 'Object reference not set to an instance of an object.'

2015-05-08 15:12:49:971 Gui.Chart.ChartPanel.OnRender: Object reference not set to an instance of an object.
2015-05-08 15:12:49:974 ERROR: Chart rendering to a software bitmap failed. There is likely a problem with a chart object's render method. D2D error = 'Object reference not set to an instance of an object.'
2015-05-08 15:12:50:795 ERROR: Chart rendering to a software bitmap failed. There is likely a problem with a chart object's render method. D2D error = 'HRESULT: [0xFB8C6408], Module: [Unknown], ApiCode: [Unknown/Unknown], Message: Unknown'
2015-05-08 15:12:51:453 Gui.Chart.ChartPanel.OnRender: Object reference not set to an instance of an object.

[NinjaTrader_Dierk]

Thanks again for findings and reporting these bugs/issues. Chart bugs are hard to analyze. Would you have steps to reproduce?