object reference not set to an instance of an object

[clfield]

Working on a strategy that was working fine. Made some changes and now it stops the 1st time it tries to place and order.

I get the following error in the LOG

object reference not set to an instance of an object

Any ideas as to how I might find which object I am trying to reference that is not an instance of an object?

I have tried to place print statements in the code to see how far it is getting before stopping. I have OnBarUpdate, OnOrderUpdate and OnExecution sections

It looks like the orders are placed and I get all the way though OnOrderUpdate but do not begin OnExecution???

[NinjaTrader_Ray]

I believe the log should show which method the object reference error occurs? If not, you can try wrapping your code in try/catch blocks to see where the exception is, the within this block of code, add some print statements to see which object you are accessing is null.

For example:

if (Instrument == null)
Print("The exception is at instrument")

etc...

[clfield]

The whole message reads
Error on Calling "OnBarUpdate" method for Stategy "XXXX". Object Reference is not set to an instance of an object

I am using two time periods. The second time period does not seem to be accessed. I have a print statement at the beginning but it does not print so I assume we stopped before getting to it.

It is interesting that I am placing 2 seperate orders however it goes though the OnOrderUpdate method 4 times. I have print statements embedded in it and they show 4 times....

Is there documentation on try-catch blocks?

[NinjaTrader_Bertrand]

Do you try adding a series you're datafeed / broker would not support clfield?

http://www.ninjatrader-support.com/HelpGuideV6/HistoricalData.html

Please see this on checking for null references -

http://www.ninjatrader-support2.com/vb/showthread.php?t=4226

And this on 'try and catch' to isolate out -

http://www.ninjatrader-support2.com/vb/showthread.php?t=9825

[clfield]

Thanks for the info. I did figure out how to add a try-catch block and did find the error that was stopping the strategy.
I am still very much a novice at C#. I have checked several books, but I guess our use of c# in ninja is a realtively small section of the overall platform.
Thanks for the links