Error on calling "SetState" method : exception has been thrown

[WalBen]

Hello,

I have an error that I don't understand : Error on calling "SetState" method : exception has been thrown. Is it possible to have some helps ? Thanks

double Ouverture;
double Cloture;
private Series<double> Range2;
double bup;
double bdown;
double inter;
double sss;

protected override void OnStateChange()
		{
			if (State == State.SetDefaults)
			{
				Description									= @"Enter the description for your new custom Indicator here.";
				Name										= "VariabiliteAlpha";
				Calculate									= Calculate.OnBarClose;
				IsOverlay									= false;
				DisplayInDataBox							= true;
				DrawOnPricePanel							= true;
				DrawHorizontalGridLines						= true;
				DrawVerticalGridLines						= true;
				PaintPriceMarkers							= true;
				ScaleJustification							= NinjaTrader.Gui.Chart.ScaleJustification.Right;
				//Disable this property if your indicator requires custom values that cumulate with each new market data event. 
				//See Help Guide for additional information.
				IsSuspendedWhileInactive					= true;
				AddPlot(new Stroke(Brushes.Orange), PlotStyle.Bar, "Plot1");
				AddPlot(Brushes.Orange, "Plot2");
				AddPlot(Brushes.Orange, "Plot3");
				 
			}
			else if (State == State.Configure)
			{
				Range2 = new Series<double>(this, MaximumBarsLookBack.Infinite);
			}
		}

		protected override void OnBarUpdate()
		{
			Cloture = Close[0];
			Ouverture = Open[0];
			
			Range2[0] = Cloture - Ouverture;
			
			if(CurrentBar>50) {
			bup = Bollinger(Range2, 2, 20).Lower[0];
			bdown = Bollinger(Range2, 2, 20).Lower[0];
			}
			
			
			Values[0][0] = Range2[0];	
			
		}

[NinjaTrader_ChelseaB]

Hello WalBen,

What is the error message you are receiving?

[jjhou]

I also received this error log several time on NT8.0.4.0 & 8.0.5.0, never found on 8.0.3.1 and before with the same indicator.

ERROR: Indicator '': Error on calling 'SetState' method: Object reference not set to an instance of an object.

the error in trace file is the same, doesn't provide more detail.
and my OnStateChange has no exception thrown. Really weird error.

[NinjaTrader_ChelseaB]

Hello jjhou,

The error indicates one of the variables has a null value.

I've copied and pasted your code into a script and tested this and I was not able to produce an error.

Are you able to reproduce an error using the test script I have exported and attached without making any modifications to this?

As a tip, to export a NinjaTrader 8 NinjaScript to share to someone else (especially for testing) do the following:

1. Click Tools -> Export -> NinjaScript...
2. Click the 'add' link -> check the box(es) for the script(s) you want to include
3. Click the 'Export' button
4. Enter a unique name for the file in the value for 'File name:'
5. Choose a save location -> click Save
6. Click OK to clear the export location message

By default your exported file will be in the following location:

• (My) Documents/NinjaTrader 8/bin/Custom/ExportNinjaScript/<export_file_name.zip>

Below is a link to the help guide on Exporting NinjaScripts.

http://ninjatrader.com/support/helpGuides/nt8/en-us/export.htm