private void _SubscribeMultipleItems(IList<OPCSubscription> opcSubscriptions)
            {

                // Set up the subscription arguments for the tags.
                DAItemGroupArguments[] itemGroupArguments = new DAItemGroupArguments[opcSubscriptions.Count()];

                int index = 0;
                foreach (OPCSubscription opcSubscription in opcSubscriptions)
                {
                    if (!this.eLynxServerFramework.Running)
                    {
                        break;
                    }

                    // override configuration for OpcAnalyzer
                    this.Server = "";
                    opcSubscription.ServerClass = "OpcTestLab.OpcAnalyzer.1";

                    if (opcSubscription.PercentDeadband.HasValue)
                    {
                        itemGroupArguments[index++] = new DAItemGroupArguments(this.Server ?? "", opcSubscription.ServerClass, opcSubscription.ItemID, opcSubscription.DataType, opcSubscription.RequestedUpdateRateMilliseconds, opcSubscription.PercentDeadband.Value, null);
                    }
                    else if (opcSubscription.DataType != null)
                    {
                        itemGroupArguments[index++] = new DAItemGroupArguments(this.Server ?? "", opcSubscription.ServerClass, opcSubscription.ItemID, opcSubscription.DataType, opcSubscription.RequestedUpdateRateMilliseconds, null);
                    }
                    else
                    {
                        itemGroupArguments[index++] = new DAItemGroupArguments(this.Server ?? "", opcSubscription.ServerClass, opcSubscription.ItemID, opcSubscription.RequestedUpdateRateMilliseconds, null);
                    }
                }

                // Get the list of handles that were subscribed to when subscribing to the items. The handles are in the same order that the
                //  subscriptions were added above.
                //OpcLabs.EasyOpc.HandleResult[] subscriptionHandles = this.EasyDA.SubscribeMultipleItems(itemGroupArguments);
                try
                {
                    int[] subscriptionHandles = this.EasyDA.SubscribeMultipleItems(itemGroupArguments);


                    // Now set the subscription handles in the OPCSubscription objects so we can un-subscribe later if needed.
                    index = 0;
                    foreach (OPCSubscription opcSubscription in opcSubscriptions)
                    {
                        // Save the subscription handle.
                        //opcSubscription.SubscriptionHandle = subscriptionHandles[index++].Handle;
                        opcSubscription.SubscriptionHandle = subscriptionHandles[index++];
                        opcSubscription.Subscribed = true;
                        //this.eLynxServerFramework.LogInformation(string.Format("Subscribing to {0}", opcSubscription.ToString()));
                    }

                }
                catch (Exception subException)
                {
                    int xxxxx = 1;

                    //throw subException;
                }

            }