SmartQuant Discussion

IB Provider - Level2Update Exception
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Author:  mikembb [ Thu Jul 20, 2017 11:47 am ]
Post subject:  IB Provider - Level2Update Exception

Dear Team,

my client has upgraded to Version: 1.0.6407.31947 and he got the following error with the IB provider when subscribing for SP and VIX future:
EventManager::OnException Exception occured in EventHandler - 07/19/2017 15:57:44.213 SmartQuant.Level2Update - System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
at System.ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource)
at System.Collections.Generic.SortedList`2.RemoveAt(Int32 index)
at SmartQuant.OrderBook.Set(Level2Update update)
at SmartQuant.DataManager.vA6tN4tX0w(Level2Update )
at SmartQuant.EventManager.qmfsIbV3aI(Event )
at SmartQuant.EventManager.OnEvent(Event e)

Time is in EST.

With his previous version, this did not happen.

Any idea what might have changed that caused this error?


Author:  mikembb [ Thu Apr 12, 2018 3:41 pm ]
Post subject:  Re: IB Provider - Level2Update Exception

Hi there.

I fixed it with this MyEventFilter.cs

using System;
using System.Collections.Generic;
using SmartQuant;

namespace OpenQuant
    public class MyEventFilter : EventFilter
        public MyEventFilter(Framework framework)
            : base(framework)

        public override Event Filter(Event e)
                switch (e.TypeId)
                    case DataObjectType.Level2:
                    case DataObjectType.Level2Snapshot:
                    case DataObjectType.Level2Update:

                        return null;
                return e;
            catch (Exception ex)
                Console.WriteLine("Error in MyEventsFilter. Error is: {0}", ex.Message);
                return null;

and this call in the Scenario:
framework.EventManager.Filter = new MyEventFilter(framework);

therefore, I conclude, that it is not possible to use Level2 data with the IB provider as of now.

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