How to catch RFC Connection error "timeout during accept"

Question

I'm connecting to SAP from C#, through SAP .NET Connector 3.0. From time to time, when the server has some troubles I suppose, my application returns the error:

LOCATION SAP-Gateway on host xxx /sapgw00
ERROR timeout during accept

I'm not able so far to catch the error in the connection class and it is very annoying, because I'm displaying in a timer, from time to time, information read from SAP.

Any ideas how to catch it?

Here is the class that i use to connect to SAP

public class InMemoryDestinationConfiguration : IDestinationConfiguration
    {
        Dictionary<string, RfcConfigParameters> availableDestinations;
        RfcDestinationManager.ConfigurationChangeHandler changeHandler;

        public InMemoryDestinationConfiguration()
        {
            availableDestinations = new Dictionary<string, RfcConfigParameters>();
        }

        public RfcConfigParameters GetParameters(string destinationName)
        {
            RfcConfigParameters foundDestination;
            availableDestinations.TryGetValue(destinationName, out foundDestination);
            return foundDestination;
        }

        //our configuration supports events
        public bool ChangeEventsSupported()
        {
            return true;
        }

        public event RfcDestinationManager.ConfigurationChangeHandler ConfigurationChanged
        {
            add
            {
                changeHandler = value;
            }
            remove
            {
                //do nothing
            }
        }

        //removes the destination that is known under the given name
        public void RemoveDestination(string name)
        {
            if (name != null && availableDestinations.Remove(name))
            {
                Console.WriteLine("Successfully removed destination " + name);
                Console.WriteLine("Fire deletion event for destination " + name);
                changeHandler(name, new RfcConfigurationEventArgs(RfcConfigParameters.EventType.DELETED));
            }
        }

        //allows adding or modifying a destination for a specific application server
        public void AddOrEditDestination(string name, int poolSize, string user, string password, string language, string client, string applicationServer, string systemNumber)
        {
             RfcConfigParameters parms = new RfcConfigParameters();
            parms.Add(RfcConfigParameters.Name, name);
            parms.Add(RfcConfigParameters.AppServerHost, applicationServer);//server ip address
            parms.Add(RfcConfigParameters.SystemNumber, "00");
            parms.Add(RfcConfigParameters.SystemID, "AAA"); //just a short name.
            parms.Add(RfcConfigParameters.User, user); //SAP user name
            parms.Add(RfcConfigParameters.Password, password);//_Password);
            parms.Add(RfcConfigParameters.Client, "777");
            parms.Add(RfcConfigParameters.Language, "EN");
            parms.Add(RfcConfigParameters.PoolSize, "10");
            parms.Add(RfcConfigParameters.IdleTimeout, "60");

 
            RfcConfigParameters existingConfiguration;

            //if a destination of that name existed before, we need to fire a change event
            if (availableDestinations.TryGetValue(name, out existingConfiguration))
            {
                availableDestinations[name] = parms;
                RfcConfigurationEventArgs eventArgs = new RfcConfigurationEventArgs(RfcConfigParameters.EventType.CHANGED, parms);
                changeHandler(name, eventArgs);
            }
            else
            {
                availableDestinations[name] = parms;
            }

        }
    }

I've tried even to verify in from the connection, by running a telnet to the port of the server and if I do not connect, to avoid getting the error message.

Here is the code for retrieving data (from a Z function module):

public List<clTRANSMON> GetTransMon(string plant, string project, string proces)
        {
            lsTransMon = new List<clTRANSMON>();
            clTRANSMON tp = new clTRANSMON();
            int result = RemoteTelnet();
            
        if (result == 4)
        {
            
            tp.STATUS = "OFFLINE";
            lsTransMon.Add(tp);
            return lsTransMon;
        }

        tp.STATUS = project.Trim() + " - " + proces.Trim();
        lsTransMon.Add(tp);

        RfcDestinationManager.RegisterDestinationConfiguration(objDestConfig);
        objDestConfig.AddOrEditDestination("mycon", 1, "myuser", "mypass", "EN", "777", _AppServerHost, "00");
        RfcDestination rfc = RfcDestinationManager.GetDestination("mycon");
        
        if (rfc != null)
        {
            rfc.Ping();
            RfcRepository repo = rfc.Repository;
            IRfcFunction readTable;
            try
            {
                IRfcFunction rTable = repo.CreateFunction("Z_MY_FUNCTION_MODULE");
                rTable.SetValue("I_PLANT", plant);
                .... 


                rTable.Invoke(rfc);
                IRfcTable dtValues = rTable.GetTable("T_ALV");

                foreach (var dataRow in dtValues)
                {
                //get all the data


                }
         
        } catch(Exception e) {}
}

        objDestConfig.RemoveDestination("mycon");
        return lsTransMon;
}

Is there a way to catch the error and avoid displaying the message? As I said, by telnet it isn't working:

   public int RemoteTelnet()
    {
        try
        {
        TcpClient client = new TcpClient(_AppServerHost, 3300);
        if (client.Connected == true)
        {
            client.Close();
            return 0;
        }
        else return 4;
    }
    catch
    {
        
        return 4;
    }
}

Thank you in advance.

PS This is the part where i'm calling the method from my class, where i had a MessageBox... I've commented it out, i have to see now if the popup appears anymore

try
{
lstTM=mySAP.GetTransMon(lsPlant,pj,lsProces[i]);
lsTM_Total.AddRange(lstTM);
}
catch (Exception eLoad)
{
//MessageBox.Show(eLoad.Message);
}