bar out of valid range

[trtrav]

I have an indicator that uses DrawArrowDown. It works fine most of the time but occasionally runs into an error:
DrawArrowDown: bar out of valid range 0 through -1 was 0.
If I close the chart and create a new chart it usually goes away.
Any ideas on how I could handle this?
I have put all the suggested:

if (CurrentBar < 1) return;

type checks but this doesn't seem to be the problem. The valid bar range from the error says 0 through -1 and I am always using 0 (current bar).

Thanks

[NinjaTrader_Bertrand]

trtrav, it would still look to me like a CurrentBars related issue - what exact call are you using for DrawArrowDown? Is this a MultiSeries script you're using it with?

Thanks,

[trtrav]

Yes, it is a multiseries. It is an indicator, I add additional series in initialize using:

 Add(PeriodType.Tick, 725);

Then in OnBarUpdate()

if (BarsInProgress==1)
{	
	if (CurrentBar < 100) //tried different numbers, but error still happens at some point.
		return;
			if (FirstTickOfBar)
			{
//more code

DrawArrowDown("short" + CurrentBar,true,0,Bollinger(Median,bbStandardDeviation, bbPeriod).Upper[0] + .4, Color.DarkSalmon);

//more code
}
}

[koganam]

Yes, it is a multiseries. It is an indicator, I add additional series in initialize using:

 Add(PeriodType.Tick, 725);

Then in OnBarUpdate()

if (BarsInProgress==1)
{	
	if (CurrentBar < 100) //tried different numbers, but error still happens at some point.
		return;
			if (FirstTickOfBar)
			{
//more code

DrawArrowDown("short" + CurrentBar,true,0,Bollinger(Median,bbStandardDeviation, bbPeriod).Upper[0] + .4, Color.DarkSalmon);

//more code
}
}

Without seeing the rest of your code, it is hard to tell, but you probably also need a bars filter for BarsInProgress == 0, your primary price DataSeries.

[NinjaTrader_Bertrand]

Please try adding a CurrentBars check for all series involved in the script :

http://www.ninjatrader.com/support/helpGuides/nt7/currentbars.htm

[trtrav]

Yes, I already have the check in both places. The DrawArrowDown is only used in the 2nd series and that is where the error is thrown and logged in the error log. Understand that I can't even duplicate this at this point. It just happens sometimes and then I close the chart and start again. Sometimes it gets stuck doing it and others it immediately (after creating a new chart) goes away.

Thanks