Strategy Error

[MindSabre]

I'm getting the following error when Analyzing a strategy:

Strategy,Error on calling 'OnBarUpdate' method for strategy 'XYZ': Object reference not set to an instance of an object.

How to debug? How can I find out which line of code in OnBarUpdate is generating the error?

[NinjaTrader_Ray]

You will have to add debug print statements to each area of your codethat has a variable that holds an object. Somewhere your code is accessing an object variable that does not hold an object.


For example:

if (myObject == null)
Print("myObjectis null);

Ray

[MindSabre]

The error is being caused by the following line of code:

if (Position.GetProfitLoss(Close[0],PerformanceUnit.Points)>=0)



When I run the code without this conditional statement the error doesn't occur.

What am I doing wrong? Do I need to initialize the Position object?



Is there any way to debug NS using VS or another debugger?

[NinjaTrader_Dierk]

- do you have code line below in the OnBarUpdate method? I just tried on a blank strategy and could not experience any issue
- there is no need to initialize the Position object
- you can not debug your NS strategy by a debugger. I suggest putting in Print() statements.

[MindSabre]

Yes, it is in the OnBarUpdate method as part of more code. When I just remove this line and let the rest of the code run, it runs fine. When I add this line as a condition to part of the code (along and shortexit), the object error appears.

[NinjaTrader_Dierk]

Can you please PM me your strategy to "dierk AT ninjatrader DOT com" in order reproduce?

I also would need:
- which instrument is this
- which timeframe (1 minute? else?)
- please send me a screenshot of your strategy settings as well

Thanks

[MindSabre]

Sent by mail.

[NinjaTrader_Dierk]

This is a bug which will be fixed with next update. Thanks for reporting that one.

[NinjaTrader_Dierk]

We created a custom build holding this fix. Please:
- uninstall NT6 via control panel
- clear your browser cache
- install custom build from here: www.ninjatrader-support.com/ninjatrader/nt6.custom/NinjaTrader.Install.msi

[MindSabre]

I'm impressed with the fast turn-around on this.

I will test the custom version first thing AM.