exception on unmanaged strategy

[Klaus Hengher]

following errors occur on unmanaged NT8 strategy

Strategy 'MinorTopBottom/132605399' has been disabled because it attempted to modify a historical order that has transitioned to a live order. Please see the help guide for more information on transitioning order references from historical to live.

2018-03-25 22:59:54:388 (My NinjaTrader Continuum) Cbi.Account.CreateOrder: orderId='b9295e1551aa43c7ad22e622445d4f0b' account='Sim101' name='SOMB_exit' orderState=Initialized instrument='ES 06-18' orderAction=BuyToCover orderType='Market' limitPrice=0 stopPrice=0 quantity=2 tif=Gtc oco='' filled=0 averageFillPrice=0 onBehalfOf='' id=773 time='2018-03-25 23:00:02' gtd='2099-12-01' statementDate='2018-03-25' id=-1
2018-03-25 22:59:54:393 (My NinjaTrader Continuum) Cbi.Account.Submit0: realOrderState=Initialized isPendingSubmit=False orderId='b9295e1551aa43c7ad22e622445d4f0b' account='Sim101' name='SOMB_exit' orderState=Submitted instrument='ES 06-18' orderAction=BuyToCover orderType='Market' limitPrice=0 stopPrice=0 quantity=2 tif=Gtc oco='' filled=0 averageFillPrice=0 onBehalfOf='' id=773 time='2018-03-25 23:00:02' gtd='2099-12-01' statementDate='2018-03-25'
2018-03-25 22:59:54:393 (My NinjaTrader Continuum) Cbi.Account.Submit1: realOrderState=Initialized orderId='b9295e1551aa43c7ad22e622445d4f0b' account='Sim101' name='SOMB_exit' orderState=Submitted instrument='ES 06-18' orderAction=BuyToCover orderType='Market' limitPrice=0 stopPrice=0 quantity=2 tif=Gtc oco='' filled=0 averageFillPrice=0 onBehalfOf='' id=773 time='2018-03-25 23:00:02' gtd='2099-12-01' statementDate='2018-03-25'
2018-03-25 22:59:54:393 (My NinjaTrader Continuum) Cbi.Simulator.Submit: realOrderState=Initialized orderId='b9295e1551aa43c7ad22e622445d4f0b' account='Sim101' name='SOMB_exit' orderState=Submitted instrument='ES 06-18' orderAction=BuyToCover orderType='Market' limitPrice=0 stopPrice=0 quantity=2 tif=Gtc oco='' filled=0 averageFillPrice=0 onBehalfOf='' id=773 time='2018-03-25 23:00:02' gtd='2099-12-01' statementDate='2018-03-25' delay=100
2018-03-25 22:59:54:393 (My NinjaTrader Continuum) Cbi.Account.OrderUpdateCallback: realOrderState=Submitted orderId='b9295e1551aa43c7ad22e622445d4f0b' account='Sim101' name='SOMB_exit' orderState=Submitted instrument='ES 06-18' orderAction=BuyToCover limitPrice=0 stopPrice=0 quantity=2 orderType='Market' filled=0 averageFillPrice=0 time='2018-03-25 23:00:02' statementDate='2018-03-25' error=NoError comment='' nr=-1
2018-03-25 22:59:54:505 (My NinjaTrader Continuum) Cbi.Account.OrderUpdateCallback: realOrderState=Accepted orderId='b9295e1551aa43c7ad22e622445d4f0b' account='Sim101' name='SOMB_exit' orderState=Accepted instrument='ES 06-18' orderAction=BuyToCover limitPrice=0 stopPrice=0 quantity=2 orderType='Market' filled=0 averageFillPrice=0 time='2018-03-25 23:00:02' statementDate='2018-03-25' error=NoError comment='' nr=-1
2018-03-25 22:59:54:505 (My NinjaTrader Continuum) Cbi.Account.OrderUpdateCallback: realOrderState=Working orderId='b9295e1551aa43c7ad22e622445d4f0b' account='Sim101' name='SOMB_exit' orderState=Working instrument='ES 06-18' orderAction=BuyToCover limitPrice=0 stopPrice=0 quantity=2 orderType='Market' filled=0 averageFillPrice=0 time='2018-03-25 23:00:02' statementDate='2018-03-25' error=NoError comment='' nr=-1
2018-03-25 22:59:54:505 (My NinjaTrader Continuum) Cbi.Simulator.Fill1: realOrderState=Working orderId='b9295e1551aa43c7ad22e622445d4f0b' maxFillQuantity=2 price=2612.25 thread=37
2018-03-25 22:59:54:505 (My NinjaTrader Continuum) Cbi.Simulator.Fill2: realOrderState=Working orderId='b9295e1551aa43c7ad22e622445d4f0b' fillQuantity=2 price=2612.25
2018-03-25 22:59:54:505 (My NinjaTrader Continuum) Cbi.Account.OrderUpdateCallback: realOrderState=Filled orderId='b9295e1551aa43c7ad22e622445d4f0b' account='Sim101' name='SOMB_exit' orderState=Filled instrument='ES 06-18' orderAction=BuyToCover limitPrice=0 stopPrice=0 quantity=2 orderType='Market' filled=2 averageFillPrice=2612.25 time='2018-03-25 23:00:02' statementDate='2018-03-25' error=NoError comment='' nr=-1
2018-03-25 22:59:54:506 (My NinjaTrader Continuum) Cbi.Account.ExecutionUpdateCallback: executionId='dcae14ca6a304f9588d43a187e271d97' account='Sim101' instrument='ES 06-18' exchange=Globex price=2612.25 quantity=2 marketPosition=Long operation=Add orderID='b9295e1551aa43c7ad22e622445d4f0b' isSod=False time='2018-03-25 23:00:02' statementDate='2018-03-25'
2018-03-25 22:59:54:572 *************** unhandled exception trapped ***************
2018-03-25 22:59:54:572 Exception has been thrown by the target of an invocation.
2018-03-25 22:59:54:621 System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.NullReferenceException: Object reference not set to an instance of an object.
at NinjaTrader.NinjaScript.StrategyBase.Process(Objec t sender, ExecutionEventArgs executionUpdate)
at System.EventHandler`1.Invoke(Object sender, TEventArgs e)
at NinjaTrader.Cbi.Account.RaiseExecutionUpdate(Execu tionEventArgs e)
at NinjaTrader.Cbi.Account.ExecutionUpdateCallback(In strument instrument, String executionId, Exchange exchange, DateTime time, MarketPosition marketPosition, String orderId, Int32 quantity, Double price, Double commission, Double fee, Boolean isSod, DateTime statementDate, Operation operation)
at NinjaTrader.Cbi.Simulator.Fill(Int32 maxFillQuantity, Double price)
at NinjaTrader.Cbi.Simulator.OnMarketData(Object sender, MarketDataEventArgs e)
at NinjaTrader.Cbi.Simulator.<>c__DisplayClass21_0.<O nTimerSubmitNow>b__0(MarketDataEventArgs e)
--- End of inner exception stack trace ---
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
at System.Reflection.RuntimeMethodInfo.UnsafeInvokeIn ternal(Object obj, Object[] parameters, Object[] arguments)
at System.Delegate.DynamicInvokeImpl(Object[] args)
at System.Windows.Threading.ExceptionWrapper.Internal RealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatch When(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
2018-03-25 23:45:45:707 Server.HdsClient.Connect: type=IS server='is-us-001.ninjatrader.com' port=31658 system='NT'

any idea how to fix this

[NinjaTrader_Jim]

Hello Klaus Hengher,

Thanks for opening the thread.

Strategy 'MinorTopBottom/132605399' has been disabled because it attempted to modify a historical order that has transitioned to a live order. Please see the help guide for more information on transitioning order references from historical to live.

This error is received when an Order object is assigned historically and then gets modified with Realtime data when that live order has different ID's. In NinjaTrader 8, we will have to transition Order objects when the state reaches State.Realtime so their order ID's can be updated from backtest generated ID's to account generated ID's. The SampleOnOrderUpdate strategy demonstrates how this can be done.

Transitioning order references from historical to live - https://ninjatrader.com/support/help...storicaltolive

SampleOnOrderUpdate - https://ninjatrader.com/support/foru...ead.php?t=7499

As for unhandled exception that is seen with the ExecutionUpdate, I could not give further input without taking debugging steps and seeing what line of code is throwing that exception.

Please let me know if I may be of further assistance.

[Klaus Hengher]

Hi Jim,

thank you for your help with transition from historical to real-time order.
Do you need trace file to check exception ?

Regards Klaus

[NinjaTrader_Jim]

Hello Klaus,

The trace file would have similar information about the error and would likely not provide additional hints.

We know that it is a null reference error, so there would be some object that was null when it was being referenced. Since the exception notes ExecutionUpdate events, I would first start debugging OnExecutionUpdate() and checking there for any potential null references. I'll also include an example unmanaged strategy that can be used to test along side your strategy while debugging and throughout development.

The Playback Connection can be used to test the strategy as if it were applied to a live data feed with realtime data. While debugging, I would suggest to run the strategy against the same set of data using the Playback Connection so the issue can be reproduced.

Information on using the Playback Connection can be found here - https://ninjatrader.com/support/help...connection.htm

Please let us know if we can be of further help.