IOrder and ArrayList execution error

[ilyats]

Hi!
I'm using Ninjatrader 7.0.1000.2.
I want to store orders in ArrayList, but I'm getting an error message

"Failed to execute DB job 'StrategyUpdateJob': Ошибка при создании документа XML.: Невозможно сериализовать NinjaTrader.Strategy.OrderProxy, т. к. он не имеет беспараметрического конструктора."

(it's in russian) when I try to add submitted order to ArrayList. Here is sample code to get this error.

#region Variables
       
        public ArrayList OrderList=new ArrayList();
        
        IOrder last_buy_order=null;
        
        
        #endregion

        /// <summary>
        /// This method is used to configure the strategy and is called once before any strategy method is called.
        /// </summary>
        protected override void Initialize()
        {
        
            CalculateOnBarClose = false;//Calculate on every tick
            Unmanaged = true;//Using unmanaged order methods
            TraceOrders = true;
            ExitOnClose = false;
        
        
        }
            
     

        /// <summary>
        /// Called on each bar update event (incoming tick)
        /// </summary>
        protected override void OnBarUpdate()
        {
        if (OrderList.Count<1)
        {
        last_buy_order=SubmitOrder(0, OrderAction.Buy, OrderType.Market, 100000, 0, 0, "", "");
          try
        {
          OrderList.Add(last_buy_order);
        }
        catch(Exception e){}
        }else return;
        
            
        }

Is there something to do with that? Is there any other way to store orders in list? I need very urgent reply, please !!!
Thank you.

[NinjaTrader_Bertrand]

Welcome to our forums - are you working on .NET 3.5 SP1 and latest patches from Microsoft? It would be helpful if you could sent your full trace / log files to support via the Help > Mail to Support feature, we would review them then for more info and insight.

You can take a look at this example here, storing references for the Set() method generated orders -

http://www.ninjatrader.com/support/forum/showthread.php?t=5790

[ilyats]

Hi, Bertrand, thanks for your reply.
I found the problem, it was because ArrayList was declared as "public" but not "private". After declaring ArrayList and last_buy_order as "private" error dissapeared.