Error in OnStateChange: Object reference not set to an instance of an object

[ericson]

Getting this error from a converted indicator from NT7. Tried hiding some code but didnt work. Indicator wont show in indicator list from chart. When i open indicator panel the error is thrown. No compile errors.

		protected override void OnStateChange() 
		{ 
		  if (State == State.SetDefaults) 
		 	{
					
				if (Instrument.MasterInstrument.InstrumentType == InstrumentType.Future &&
					(Instrument.MasterInstrument.Name == "EMD"))				
					isGlobex = true;
				else
					isGlobex = false;
				if (sessionType == anaSessionTypeVWAPD43.Trading_Day && isGlobex)
				{
					publicHoliday[0] = publicHoliday0;
				}
				else for(int i=0; i<42; i++)
					publicHoliday[i] = NinjaTrader.Core.Globals.MinDate;
				if (Instrument.MasterInstrument.InstrumentType == Cbi.InstrumentType.Forex )
					isCurrency = true;
				else
					isCurrency = false;
				
				
			//------------------------------------------------------
				
				  if (sessionType == anaSessionTypeVWAPD43.ETH || sessionType == anaSessionTypeVWAPD43.Trading_Day) 
				{
					rthVWAP = false;
					shiftAnchor = TimeSpan.Compare(sessionOffset, new TimeSpan(0,0,0));
					if(shiftAnchor > 0)
						applySessionOffset = true;
				}
				else 
				{	
					rthVWAP = true;
					shiftAnchor = 0;
					applySessionOffset = false;
					if (sessionType == anaSessionTypeVWAPD43.RTH)
						continueSession = false;
					else
						continueSession = true;
					if (selectedSession == anaSessionCountVWAPD43.Auto)
					{
						if (isCurrency)
							activeSession = anaSessionCountVWAPD43.Third;
						else
							activeSession = anaSessionCountVWAPD43.Second;
					}
					else 
						activeSession = selectedSession; 			
				}
				
			AddPlot(new Stroke(Brushes.Gold,1),PlotStyle.Dot,"Session VWAP");
			AddPlot(new Stroke(Brushes.Gold,1),PlotStyle.Line,"Upper Band SD 3");
			AddPlot(new Stroke(Brushes.Gold,1),PlotStyle.Line,"Upper Band SD 2");
			AddPlot(new Stroke(Brushes.Gold,1),PlotStyle.Line,"Upper Band SD 1");
			AddPlot(new Stroke(Brushes.Gold,1),PlotStyle.Line,"Lower Band SD 1");
			AddPlot(new Stroke(Brushes.Gold,1),PlotStyle.Line,"Lower Band SD 2");
			AddPlot(new Stroke(Brushes.Gold,1),PlotStyle.Line,"Lower Band SD 3");
			

			
			
			innerAreaBrush = new SolidColorBrush(Color.FromArgb(75, 30,144,255));
			middleAreaBrush = new SolidColorBrush(Color.FromArgb(0, 65,105,225));
			outerAreaBrush = new SolidColorBrush(Color.FromArgb(75, 0,0,128));
			Plots[1].Brush				= OuterBandColor;
			Plots[2].Brush				= MiddleBandColor;
			Plots[3].Brush				= InnerBandColor;
			Plots[4].Brush				= InnerBandColor;
			Plots[5].Brush				= MiddleBandColor;
			Plots[6].Brush				= OuterBandColor;
			Plots[0].Width 				= plot0Width;
			Plots[0].PlotStyle			= plot0Style;
			Plots[0].DashStyleHelper 	= dash0Style;
			Plots[1].Width 				= plot1Width;
			Plots[1].PlotStyle			= plot1Style;
			Plots[1].DashStyleHelper 	= dash1Style;
			Plots[2].Width 				= plot1Width;
			Plots[2].PlotStyle			= plot1Style;
			Plots[2].DashStyleHelper 	= dash1Style;
			Plots[3].Width 				= plot1Width;
			Plots[3].PlotStyle			= plot1Style;
			Plots[3].DashStyleHelper 	= dash1Style;
			Plots[4].Width 				= plot1Width;
			Plots[4].PlotStyle			= plot1Style;
			Plots[4].DashStyleHelper 	= dash1Style;
			Plots[5].Width 				= plot1Width;
			Plots[5].PlotStyle			= plot1Style;
			Plots[5].DashStyleHelper 	= dash1Style;
			Plots[6].Width 				= plot1Width;
			Plots[6].PlotStyle			= plot1Style;
			Plots[6].DashStyleHelper 	= dash1Style;
			gap0 = (plot0Style == PlotStyle.Line || plot0Style == PlotStyle.Square);
			gap1 = (plot1Style == PlotStyle.Line || plot1Style == PlotStyle.Square);
			if (Bars.BarsPeriod.BarsPeriodType == BarsPeriodType.Minute || Bars.BarsPeriod.BarsPeriodType == BarsPeriodType.Second)
				tickBuilt = false;
			else
				tickBuilt = true;
			if(ChartControl != null)
				textBrush = ChartControl.Properties.AxisPen.Brush;
			countDown = 2;
			anchorBar = false;
			
						IsAutoScale			= false;
			IsOverlay				= true;
			ArePlotsConfigurable	= false;
			ZOrder 				= 0;
			BarsRequiredToPlot		= 0;
		  	}
			//----------------------------------------
		  if (State == State.Configure) 
  			{ 
			
			}
			//------------------------------------
			if (State == State.Terminated) 
			  {
				  //Bars.Dispose();
			  	/*innerAreaBrush.Dispose();
				 middleAreaBrush.Dispose();
				 outerAreaBrush.Dispose();*/
			  }
		}//onstatechange

[NinjaTrader_AlanP]

Hello Ericson,

Thank you for your note.

Without the full code, I’m unable to test on my end. If you’d like to upload a full copy of the code, I can take a look and see if anything stands out. Otherwise I’d suggest seeing the following post on conversion as well as reading through the code breaking changes while converting the script from NT7.

http://ninjatrader.com/support/forum/showthread.php?t=79551

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

To export a NinjaScript from NinjaTrader 8 do the following:

• From the Control Center window select Tools -> Export -> NinjaScript...
• Click Add>Select the indicator>OK>Export.
• Then attach that file you saved; under My Docs>NT8>Bin>Custom>Select the downloaded .zip file.

Please let us know if you need further assistance.

[ericson]

Here is a copy.

[NinjaTrader_AlanP]

Hello ericson,

I was unable to identify the issue exactly but was able to reproduce.

In the support department at NinjaTrader we do not create, debug, or modify code for our clients. This is so that we can maintain a high level of service for all of our clients as well as our partners.

You can also contact a professional NinjaScript Consultants who would be eager to create or modify this script at your request or assist you with your script. Please let me know if you would like our business development follow up with you with a list of professional NinjaScript Consultants who would be happy to create this script or any others at your request.

Please let us know if you need further assistance.

[ericson]

Ok, i wont be needing a service at this time. Thank you.