NT hands and when removing data series from chart

[onnb1]

hi, I am working on a multi-instrument indicator. The indicator has properties for symbol, bar type and period.

The following steps cause NT to hangOpen a chart

1. Add the indicator to the chart
2. Configure two symbols
3. View the chart - Initialize Adds the two symbol; everything ok so far
4. Open indicator parameters and remove one of the symbols (by setting the symbol field to "")
5. Go back to chart => Ninja hands and chart does not display anymore.

Below is the simplest code I could make that reproduces this. It happens 100% of the time on my computer and on others computers as well.

--Onn

namespace NinjaTrader.Indicator
{
    [Description("")]
    public class Tester : Indicator
    {
        
        private string symbol1 = "";
        private int period1 = 15;
        private PeriodType type1 = PeriodType.Minute;
        
        private string symbol2 = "";
        private int period2 = 15;
        private PeriodType type2 = PeriodType.Minute;
        
        protected override void Initialize()
        {
            if (symbol1 != "")
            {
                Add(symbol1, type1, period1);
            }
            
            if (symbol2 != "")
            {
                Add(symbol2, type2, period2);
            }
        }
            
        protected override void OnBarUpdate()
        {
            return;
        }
        
        #region Properties
        
        public string Symbol1
        {
            get { return symbol1; }
            set { symbol1 = value; }
        }
        
        public int Period1
        {
            get { return period1; }
            set { period1 = value; }
        }
        
        public PeriodType Type1
        {
            get { return type1; }
            set { type1 = value; }
        }
        
        
        public string Symbol2
        {
            get { return symbol2; }
            set { symbol2 = value; }
        }
        
        public int Period2
        {
            get { return period2; }
            set { period2 = value; }
        }
        
        [Description("")]
        public PeriodType Type2
        {
            get { return type2; }
            set { type2 = value; }
        }


        #endregion
    }
}

[NinjaTrader_CalH]

Hello onnb1,

Thank you for your post.

There is an Index out of range of the array error that will get produced in your Trace file.

What is occurring is in the first initialization is adding the other indexes to the BarsArray[] count
When you remove the instrument, the BarArray object is still there and the reason you run into this error.

I will confer with my colleagues on Monday about the scenario

Thank you for your patience.

[onnb1]

hi, just checking if any update on this.

[NinjaTrader_Brandon]

Hello onnb1,

Thanks for your post.

Cal is out today however I have another NinjaScript representative looking into this. If he gets more info today he will reply, otherwise Cal may work with the NinjaScript lead when they both return tomorrow to look into this further.

[onnb1]

no worries; this is not urgent and can wait for Cal/tomorrow. Just wanted to follow up so it doesn't get lost

[NinjaTrader_CalH]

Onnb1,

After some research, this is a limitation with the BarsArray object loading.

Development is looking to handling this more gracefully in NT8, however dynamic adds will not be fully supported.