Null Reference exception during optimization

[aufidius]

System.NullReferenceException was unhandled
Message: An unhandled exception of type 'System.NullReferenceException' occurred in mscorlib.dll
Additional information: Object reference not set to an instance of an object.

got this when doing optimization on a strategy.


settings...

using default optimizer on profit factor

and call Stack

[aufidius]

I was worried that maybe something got corrupted in my migration of NT7 to NT8 data so I reinstalled and didn't import my NT7 settings.

Using EOD data from Kinetic i'm getting the same error from the MACross strategy.

[aufidius]

anyone else getting this?

[NinjaTrader_Matthew]

We've had a view similar reports. Can you please try putting the following in State.SetDefaults

protected override void OnStateChange()
{
     if (State == State.SetDefaults)
     {
          // Set to true for debug purposes. If optimization results were off when this was set to false there
          // likely is a user variable reset issue that needs to be addressed
          IsInstantiatedOnEachOptimizationIteration = true;
     }
}

If this does not help, can you please email your log/trace files to platformsupport[at]ninjatrader[com]

[aufidius]

that resolved the issue.

[NinjaTrader_Matthew]

Thanks for confirming, but you shouldn't necessarily need to do that to prevent such an error depending on how the strategy is coded. Can you send us a reproduction of the error to support at NinjaTrader dot com? We likely only need the OnStateChange logic if you can provide that logic at the minimum

[aufidius]

Bad news...

Last night my machine upgraded from Windows 8.1 to Windows 10 and now I am unable to reproduce the error. All strategies work fine without the change mentioned earlier.

Maybe the issue is related to specific versions of the .NET runtime? Either way if it happens again I'll email in the log data.

[NinjaTrader_Matthew]

Interesting... well thanks for the update. We'll keep our eyes peeled as well.