Bars.GetBar Exception

[soulfx]

Hello, I am testing an indicator and in the debugger a NullException is thrown for the below


int startBarsAgo = Bars.GetBar(startDateTime); EXCEPTION on this line

int endBarsAgo = Bars.GetBar(endDateTime);


This indicator is used on both time based and non time based charts.
I have a custom bar type which is a variation of a range bar.

Would you expect for a non time based bar it to return the prior bar?

What is interesting is that i have been running this for some time and it wasnt apparent til running through debugger that this could have been issue on occassion.

In looking at the documentation it doesnt say that this is only for time based bars but wondered what logic would return a null. Of course in non time based there will not necessarily be a bar at that specific time.

The indicator draws horizontal lines between a start time and end time for each trading day.

thanks

[NinjaTrader_JessicaP]

Hello soulfx, and thank you for your query.

To debug this strategy, we should first examine whether startDateTime and endDateTime are ever null before being passed in to GetBar, and whether your Bars object has been initialized. Please add these lines of code before the ones you sent us, and let us know what results you get in your New -> NinjaScript Output Window.

[FONT=Courier New]Print("TEST 1 : Bars is" + (Bars == null ? "" : "n't") + " null");
Print("TEST 2 : startDateTime is" + (startDateTime == null ? "" : "n't") + " null");
Print("TEST 3 : endDateTime is" + (endDateTime == null ? "" : "n't") + " null");
Print("TEST 4 : startDateTime is" + (startDateTime is DateTime ? "" : "n't") + " a DateTime object");
Print("TEST 5 : endDateTime is" + (endDateTime is DateTime ? "" : "n't") + " a DateTime object");
[/FONT]

Thank you in advance, this information will aid us in seeing the same thing you are seeing. For reference, this is the desired output.

TEST 1 : Bars isn't null
TEST 2 : startDateTime isn't null
TEST 3 : endDateTime isn't null
TEST 4 : startDateTime is a DateTime object
TEST 5 : endDateTime is a DateTime object