Referencing a ChartScale object outside of OnRender() to use <chartAnchor>.GetPoint()

[zacharydw00]

Is it acceptable to use <chartAnchor>.GetPoint() outside of OnRender(). To do this I'm acquiring the ChartScale oject from within OnRender, like this

protected override void OnRender(ChartControl _chartControl, ChartScale _chartScale)
{
    base.OnRender(_chartControl, _chartScale);
    [B]chartScale [/B]= _chartScale;
​

elsewhere unrelated to OnRender() I have this

private void GetPointsFromAnchor(bool _testSizeChanged)
{
            rectStartPoint    = rect.StartAnchor.GetPoint( this.ChartControl, this.ChartPanel, [B]chartScale[/B], false );
​

The reason I ask is, because I'm seeing random rendering errors, and wondering if that is the cause? The indicator still runs on the chart.

- A direct X error has occurred while rendering the chart: HRESULT: [0x88990001], Module: [SharpDX.Direct2D1], ApiCode: [D2DERR_WRONG_STATE/WrongState], Message: The object was not in the correct state to process the method.
- Chart rendering failed. There is likely a problem with a chart object's OnRender method. D2D error = 'HRESULT: [0x88990001], Module: [SharpDX.Direct2D1], ApiCode: [D2DERR_WRONG_STATE/WrongState], Message: The object was not in the correct state to process the method. '

[NinjaTrader_ChelseaB]

Hello zacharydw00,

A Dispatcher.InvokeAsync() is needed to work with the ChartControl/ChartPanels/ChartScales.

https://ninjatrader.com/support/helpGuides/nt8/multi-threading.htm