strange error on Barupdate() with OnEachTick

[steinberg123]

I have encounter strange error. I am running the the following code on range chart. it works well before 15;00PM in beijing time zone. However, it would report error and stop itself after 15;00PM in beijing time zone. the error is error on calling " onbarupdate" method on bar 0:you are accessing an index a value that is invalid since it is out of range. it seems it error in (lastExecutionTime.Minute != Time[1].Minute || lastExecutionTime.Hour != Time[1].Hour . if I replace it with "true", the code would works well. But , it would run on each tick, which is not wanted. I just want it run one time for one bar .

region Using declarations
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Xml.Serialization;
using NinjaTrader.Cbi;
using NinjaTrader.Gui;
using NinjaTrader.Gui.Chart;
using NinjaTrader.Gui.SuperDom;
using NinjaTrader.Data;
using NinjaTrader.NinjaScript;
using NinjaTrader.Core.FloatingPoint;
using NinjaTrader.NinjaScript.Indicators;
using NinjaTrader.NinjaScript.DrawingTools;
using System.Timers;
#endregion

namespace NinjaTrader.NinjaScript.Strategies
{
public class new78 : Strategy
{
// Input parameters with attributes for the window



private Account myAccount;
private DateTime lastExecutionTime = DateTime.MinValue;
private int counter=0;



protected override void OnStateChange()
{
if (State == State.SetDefaults)
{
Description = "new7";
Name = "new78";
Calculate = Calculate.OnEachTick;
IsOverlay = true;

// Set default parameter values

EntryHandling = EntryHandling.AllEntries;
}
else if (State == State.Configure)
{

myAccount = Account;
}
else if (State == State.DataLoaded)
{

}
else if (State == State.Terminated)
{


}
}



protected override void OnBarUpdate()
{
DateTime currentTime = DateTime.Now;
//Print("124");

if (lastExecutionTime.Minute != Time[1].Minute || lastExecutionTime.Hour != Time[1].Hour)
{
//if (State < State.Realtime) // Skip historical data
// return;



//Print("789");
DateTime currentTime1 = Time[0];

Print("NinjaTrader current time: " + DateTime.Now.ToString("HH:mm:ss"));
Print("counter22:"+counter);



lastExecutionTime = Time[0];


}


//mainTimer.Interval = 30 * 1000;
// mainTimer.Start();
}






}
}

[NinjaTrader_ChelseaB]

Hello steinberg123,

Ensure for any indexes you are accessing the index is less than the size of the collection.

For barsAgo indexes, these must be less than CurrentBar.

https://developer.ninjatrader.com/docs/desktop/make_sure_you_have_enough_bars

https://forum.ninjatrader.com/forum/ninjatrader-8/indicator-development/1046200-indicator-that-calculate-in-different-chartime#post1048513

Try adding to the top of the OnBarUpdate() block:

if (CurrentBar < 1)
return;