Object not set to an instance of an object on bar -1

[blar58]

I very often get the following error message : Error on triggering custom event for NinjaScript 'MY Indicator name' on bar -1: Object reference not set to an instance of an object.
Can I get more details about this error I don't know where to start looking ?
Does on bar -1 means from the OnState method ?

[NinjaTrader_ChelseaB]

Hello blar58,

What is the exact line that is causing the error?

You can prints to find where code stops executing and check if objects are null.
You can comment out logic to ensure that code isn't causing the error.

Does your script have multiple series?

[blar58]

Actually it happened on one of my customer's computer.
It happens from time to time on mine but not today.
Yes I am using multiple series

[NinjaTrader_ChelseaB]

Hello blar58,

Its likely a nullable object that has not had a check for null.

I recommend you debug the script (even if you need to debug on that specific computer) and find the line that is causing the error.

[blar58]

OK I will thank you !

My customer ran into another problem that I am not experiencing myself.

In my indicator I have created a new Bar Type and he gets the following error message :
2018-10-18 12:33:19:188|3|4|Bars type 'KinetickDayBarsType': Error on calling 'OnStateChange' method: System.MissingMethodException: Method not found: 'System.String System.String.Format(System.IFormatProvider, System.String, System.Object)'.
at NinjaTrader.NinjaScript.BarsTypes.KinetickDayBarsT ype.OnStateChange()
at NinjaTrader.Data.BarsType.SetState(State state)

Any idea ?

[NinjaTrader_ChelseaB]

Hello blar58,

From the error it looks like this is coming from a custom bar type named KinetickDayBarsType. The error looks to be coming from the OnStateChange() method.

From a google search on System.String System.String.Format() this might be a .NET issue. Something in the script might be targeting .NET 4.6. NinjaTrader targets .NET 4.5.

Are any bar types included with NinjaTrader 8 able to reproduce the behavior or is this only affecting the custom bar type?

When you mention in your indicator you have created a new bar type, are you actually saying in an indicator you are adding a data series with AddDataSeries() that already existing imported bar type?

[blar58]

It is only affecting the custom bar type.
No I am not adding a data series with AddDataSeries() that already existing imported bar type and in fact this indicator is not using this bar type at all.

[NinjaTrader_ChelseaB]

Hello blar58,

Can you clarify your note:
"In my indicator I have created a new Bar Type"

From understanding it is not possible to create a new bar type in an indicator script.

[blar58]

Yes sorry I was not very clear.
This bar type has been added to the zip file, it is not in the indicator.

[NinjaTrader_ChelseaB]

Hello blar58,

If the system bar types included with NinjaTrader are not able to reproduce the behavior, the issue is likely caused by code in the custom bar type's OnStateChange() method.
Specifically if there is code that targets .NET 4.6 this would need to removed.

Again, I would recommend using prints and commenting out code to find the exact line causing the error.

[blar58]

OK

Thank you !