diff --git a/IOB-WIN/DATA/CONF/MAIN.ini b/IOB-WIN/DATA/CONF/MAIN.ini
index 5d8d8e0a..5327409f 100644
--- a/IOB-WIN/DATA/CONF/MAIN.ini
+++ b/IOB-WIN/DATA/CONF/MAIN.ini
@@ -47,7 +47,7 @@ CMDIOB2CALL=/IOB/getIob2call?GWIP=
 
 
 ; SIMULAZIONE verso server ufficio
-STARTLIST=SIMUL_01
+STARTLIST=SIMUL_01,SIMUL_02,SIMUL_03,SIMUL_04
 
 ;STARTLIST=SIM_DP_02
 ;STARTLIST=SIMUL_03,SIMUL_04,SIMUL_05,SIMUL_06,SIMUL_07,SIMUL_08
diff --git a/IOB-WIN/IobGeneric.cs b/IOB-WIN/IobGeneric.cs
index 859a2deb..7125e18d 100644
--- a/IOB-WIN/IobGeneric.cs
+++ b/IOB-WIN/IobGeneric.cs
@@ -3,6 +3,7 @@ using Newtonsoft.Json;
 using NLog;
 using System;
 using System.Collections;
+using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Globalization;
@@ -36,7 +37,7 @@ namespace IOB_WIN
     /// <summary>
     /// Indicazione VETO check status IOB x evitare loop troppo stretti...
     /// </summary>
-    public static DateTime dtVetoCheckIOB = DateTime.Now;
+    public DateTime dtVetoCheckIOB = DateTime.Now;
     /// <summary>
     /// Contapezzi attuale
     /// </summary>
@@ -116,19 +117,19 @@ namespace IOB_WIN
     /// <summary>
     /// Oggetto della coda degli elementi letti (e non ancora trasmessi)
     /// </summary>
-    public Queue<string> QueueIN = new Queue<string>();
+    public ConcurrentQueue<string> QueueIN = new ConcurrentQueue<string>();
     /// <summary>
     /// Oggetto della coda degli elementi letti di tipo FluxLog (e non ancora trasmessi)
     /// </summary>
-    public Queue<string> QueueFLog = new Queue<string>();
+    public ConcurrentQueue<string> QueueFLog = new ConcurrentQueue<string>();
     /// <summary>
     /// Coda valori simulazione deterministica...
     /// </summary>
-    public Queue<int> QueueSIM = new Queue<int>();
+    public ConcurrentQueue<int> QueueSIM = new ConcurrentQueue<int>();
     /// <summary>
     /// Coda valori letti x DEBUG...
     /// </summary>
-    public Queue<int> QueueDebug = new Queue<int>();
+    public ConcurrentQueue<int> QueueDebug = new ConcurrentQueue<int>();
 
     /// <summary>
     /// valore booleano di check se sia in fase di COMUNICAZIONE ATTIVA con il PLC/NC
@@ -437,9 +438,15 @@ namespace IOB_WIN
       // svuoto code se richiesto
       if (resetQueue)
       {
+        QueueIN = new ConcurrentQueue<string>();
+        QueueFLog = new ConcurrentQueue<string>();
+        QueueSIM = new ConcurrentQueue<int>();
+#if false
+        // non permresso clear --> creo nuove code!
         QueueIN.Clear();
         QueueFLog.Clear();
-        QueueSIM.Clear();
+        QueueSIM.Clear(); 
+#endif
       }
       // imposto contatori blink a zero...
       i_counters = new int[32];
@@ -781,7 +788,12 @@ namespace IOB_WIN
         while (QueueIN.Count > 0)
         {
           // INVIO COMUNQUE...!!!
-          sendToMoonPro(urlType.SignIN, QueueIN.Dequeue());
+          string valore = "";
+          QueueIN.TryDequeue(out valore);
+          sendToMoonPro(urlType.SignIN, valore);
+#if false
+          sendToMoonPro(urlType.SignIN, QueueIN.Dequeue()); 
+#endif
         }
         parentForm.displayTaskAndLog("Svuotamento FORZATO coda FluxLOG...");
         // se ho + di 2 elementi in coda --> uso invio JSON in blocco...
@@ -793,10 +805,15 @@ namespace IOB_WIN
             // se ho + di maxJsonData elementi --> invio un set di dati alla volta
             if (QueueFLog.Count > maxJsonData)
             {
+              string currVal = "";
               // prendoi primi maxJsonDataValori
               for (int i = 0; i < maxJsonData; i++)
               {
-                listaValori.Add(QueueFLog.Dequeue());
+                QueueIN.TryDequeue(out currVal);
+                listaValori.Add(currVal);
+#if false
+                listaValori.Add(QueueFLog.Dequeue()); 
+#endif
               }
               sendDataBlock(urlType.FLog, listaValori);
             }
@@ -807,17 +824,25 @@ namespace IOB_WIN
               // invio
               sendDataBlock(urlType.FLog, listaValori);
               // svuoto!
-              QueueFLog.Clear();
+              QueueFLog = new ConcurrentQueue<string>();
+#if false
+              QueueFLog.Clear(); 
+#endif
             }
           }
           // HO FINITO invio di FLog...
         }
         else
         {
+          string currVal = "";
           while (QueueFLog.Count > 0)
           {
             // INVIO COMUNQUE...!!!
-            sendToMoonPro(urlType.FLog, QueueFLog.Dequeue());
+            QueueFLog.TryDequeue(out currVal);
+            sendToMoonPro(urlType.FLog, currVal);
+#if false
+            sendToMoonPro(urlType.FLog, QueueFLog.Dequeue()); 
+#endif
           }
         }
       }
@@ -2186,7 +2211,10 @@ namespace IOB_WIN
               if (QueueIN.Count > 0)
               {
                 // recupero ed aggiorno ULTIMO valore...
-                lastSignInVal = QueueIN.Dequeue();
+                QueueIN.TryDequeue(out lastSignInVal);
+#if false
+                lastSignInVal = QueueIN.Dequeue(); 
+#endif
                 // se ERA online provo
                 if (MPOnline)
                 {
@@ -2265,10 +2293,15 @@ namespace IOB_WIN
                     // se ho + di maxJsonData elementi --> invio un set di dati alla volta
                     if (QueueFLog.Count > maxJsonData)
                     {
+                      string currVal = "";
                       // prendoi primi maxJsonDataValori
                       for (int j = 0; j < maxJsonData; j++)
                       {
-                        listaValori.Add(QueueFLog.Dequeue());
+                        QueueFLog.TryDequeue(out currVal);
+                        listaValori.Add(currVal);
+#if false
+                        listaValori.Add(QueueFLog.Dequeue()); 
+#endif
                       }
                       sendDataBlock(urlType.FLog, listaValori);
                     }
@@ -2279,14 +2312,21 @@ namespace IOB_WIN
                       // invio
                       sendDataBlock(urlType.FLog, listaValori);
                       // svuoto!
+                      QueueFLog = new ConcurrentQueue<string>();
+#if false
                       QueueFLog.Clear();
-                      // HO FINITO invio di FLog...
+#endif   
                     }
                   }
                   else
                   {
                     // INVIO SINGOLO...!!!
+                    string currVal = "";
+                    QueueFLog.TryDequeue(out currVal);
+                    sendToMoonPro(urlType.FLog, currVal);
+#if false
                     sendToMoonPro(urlType.FLog, QueueFLog.Dequeue());
+#endif                  
                   }
                 }
                 else
diff --git a/Jenkinsfile b/Jenkinsfile
index d818ad0d..a1a85bd0 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -16,7 +16,7 @@ pipeline {
 
       /* calcolo numero versione... diverso x branch MASTER/DEVELOP */
       script {
-        withEnv(['NEXT_BUILD_NUMBER=486']) {
+        withEnv(['NEXT_BUILD_NUMBER=487']) {
           // env.versionNumber = VersionNumber(versionNumberString : '2.3.${BUILD_DATE_FORMATTED, "yyMM"}.${BUILDS_ALL_TIME}', projectStartDate : '2006-01-01', skipFailedBuilds: true)
           env.versionNumber = VersionNumber(versionNumberString : '2.3.${BUILD_DATE_FORMATTED, "yyMM"}.${BUILDS_ALL_TIME}', projectStartDate : '2006-01-01', skipFailedBuilds: true, overrideBuildsAllTime: '${NEXT_BUILD_NUMBER}')
           env.APP_NAME = 'MAPO-IOB-WIN'