Trace Order Status during executing Code in different Methods

Hi there,

I have an Issue tracking the Status of an Order while executing different Methods in my Code.

Basically I do not want my Code to stop if a Market Order is executed in Order to be able to continue with Calculations.

My Code looks like this

namespace cAlgo
{
   [Robot(TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
   public class myBot: Robot
   {
      public TradeOperation OpenLong;

      Method1()
      {
         TradeOperation OpenLong = ExecuteMarketOrderAsync(TradeType.Buy,Symbol,10,"OpenLong",30,30);
      }

      onTick()
      {
         If(OpenLong.TradeResult.IsSuccessful == true) Print("Order filled")
      }
   }
}

If the Code Execution proceeds the the If() in onTick() I get an 'System.NullReferenceException'.

What am I missing, respectively how can I query the Order Status from another Method?

Thank you!