Index outside bounds of array error

[Mindset]

Hi this is my code that seems to be producing an error.
I can't see where the error is??

        protected override void OnBarUpdate()
        {
    if(CurrentBar < 50)
            return;
        ///Only works on Volumetric Bar Types
         NinjaTrader.NinjaScript.BarsTypes.VolumetricBarsType barsType = BarsArray[0].BarsType as
         NinjaTrader.NinjaScript.BarsTypes.VolumetricBarsType;    
         if (barsType == null)
          return;​
}

[NinjaTrader_BrandonH]

Hello Mindset,

Thanks for your post.

This error message means an invalid index was used somewhere in your script.

For example, with the error:
"Error on calling 'OnBarUpdate' method on bar 0: You are accessing an index with a value that is invalid since it is out-of-range. I.E. accessing a series [barsAgo] with a value of 5 when there are only 4 bars on the chart". This message indicates an invalid index was used.

As one example, calling Close[1] when CurrentBar is 0 (the very first bar) will cause this error. The reason for this is because there will not be a bar ago; essentially there is not enough data at bar 0 look back one bar.

The script will start from the far left of the chart at the very beginning where the CurrentBar will equal 0 and then start working to the right, calling OnBarUpdate() for each bar. In this specific example, it would be needed to wait for the second bar to be built (from all series if there are multiple series added), to ensure that you have enough data to call an index 1 bar ago. This is especially important when multiple series are added to a single script as the data for all series may not start at the same time.

Below is a link to the help guide on this specific example of an indexing error.
https://ninjatrader.com/support/help...nough_bars.htm

Also, below are links to the help guide on CurrentBar and CurrentBars.
http://ninjatrader.com/support/helpG...currentbar.htm
https://ninjatrader.com/support/help...urrentbars.htm

Indexing errors can also occur when using an invalid index with arrays or collections.

Below are public links to 3rd party educational sites on arrays and index out of range errors.

https://www.dotnetperls.com/array

What was the exact index you tried to use that was invalid?

Did you ensure the Count of that object is equal to or greater than the index used?

Let me know if I may assist further.