A limit buy was filled at "exactly" the same time I decremented a matching OCO stop order using the decrement key in the control panel orders tab. I can send log files if needed.
Thanks,
Chris
The trace file did capture it:
2017-02-22 21:19:55:607 *************** unhandled exception trapped ***************
2017-02-22 21:19:55:607 Object reference not set to an instance of an object.
2017-02-22 21:19:55:620 System.NullReferenceException: Object reference not set to an instance of an object.
at MS.Internal.Data.ClrBindingWorker.OnSourceProperty Changed(Object o, String propName)
at System.Windows.WeakEventManager.ListenerList`1.Del iverEvent(Object sender, EventArgs e, Type managerType)
at System.ComponentModel.PropertyChangedEventManager. OnPropertyChanged(Object sender, PropertyChangedEventArgs args)
at NinjaTrader.Gui.NotifyPropertyChangedBase.OnProper tyChanged(String propertyName)
at NinjaTrader.Gui.SuperDom.PriceRow.set_IsBuyStopLos s(Boolean value)
at NinjaTrader.Gui.SuperDom.PriceRow.UpdateProperties (Boolean triggerPropertyChanged)
at NinjaTrader.Gui.SuperDom.SuperDomViewModel.OnOrder UpdateNow()
at System.Threading.ExecutionContext.RunInternal(Exec utionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionCon text executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.QueueUserWorkItemCallback.System. Threading.IThreadPoolWorkItem.ExecuteWorkItem()
at System.Threading.ThreadPoolWorkQueue.Dispatch()
2017-02-22 21:19:55:655 (NtContinuum) CQG.Adapter.OnOrderChanged0:...
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