Ninjatrader Exception output

[number1]

Hi Ninjatrader,

I am successfully catching an exception within an indicator script and dealing with them, but I am still seeing the exception written to the output window.

Are exceptions, regardless of try{catch} written to the output window internally even though the exception was caught?

I ask in case there is another exception that I am not aware of and if so, this would save me some diagnostic time.

Thank you for any help

Number1

[NinjaTrader_JC]

Hello Number1,

The exception that NinjaTrader is displaying should be the same exception message that you are catching.

What exception message are you getting so that I may try to assist you?

[number1]

Hi JC,

Yes, the exception is the same (the dreaded index is out of range execption for a multiple-instrument intraday bar chart).

However, I have narrowed it down. The exception is occurring prior to my Try{catch} when the indicator is trying to access the Times[] array/list and thus the exception written was not the one being caught but before the try{catch}. I never imagined that the Times[][0] could not exist on an OnBarUpdate event. That is crazy as one would think the Time[] would exist for the instrument if the instrument trades. Perhaps, the OnBarUpdate is receiving price data ahead of that Time[] array creation?

This only happens on the opening session. I guess I need to check for Times[][0] existence?

Thanks for your input.

Number1

[NinjaTrader_JC]

Hello Number1,

The Times[][] object will be created when the OnBarUpdate() event for that series is called.

You may just use the CurrentBars[] to check see if the objects (including the Times[][]) have been created before you access them.

For example:

if (CurrentBars[0] < BarsRequired || CurrentBars[1] < BarsRequired)
return;

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