diff --git a/IOB-WIN/IobMTC.cs b/IOB-WIN/IobMTC.cs
index e056c371..c5b60e86 100644
--- a/IOB-WIN/IobMTC.cs
+++ b/IOB-WIN/IobMTC.cs
@@ -5,6 +5,7 @@ using Newtonsoft.Json;
 using System;
 using System.Collections.Generic;
 using System.Net.NetworkInformation;
+using System.Threading;
 using MTConnectDevices = MTConnect.MTConnectDevices;
 using MTConnectStreams = MTConnect.MTConnectStreams;
 
@@ -30,6 +31,10 @@ namespace IOB_WIN
     /// </summary>
     protected bool enableDataFilter = false;
     /// <summary>
+    /// Determina se ha effettuata lettura items in memoria x confronto...
+    /// </summary>
+    protected bool hasReadItems = false;
+    /// <summary>
     /// URL x salvataggio elenco dataItems MTC
     /// </summary>
     protected string urlSaveDataItems
@@ -185,14 +190,18 @@ namespace IOB_WIN
           lgInfo($"---------------- Elenco Devices ----------------");
           // loggo devices principali...
           logDevicesList(probe.Devices);
+#if false
           // chiamo il device succesful!
-          DevicesSuccessful(probe);
+          DevicesSuccessful(probe); 
+#endif
         }
       }
       catch (Exception exc)
       {
         lgError($"Eccezione durante test probe:{Environment.NewLine}{exc}");
       }
+      // attendo 1 sec...
+      Thread.Sleep(1000);
       // ora avvio
       try
       {
@@ -203,6 +212,8 @@ namespace IOB_WIN
         MTC_ref.CurrentReceived += StreamsSuccessful;
         MTC_ref.SampleReceived += StreamsSuccessful;
 
+        // attendo 1 sec...
+        Thread.Sleep(1000);
         MTC_ref.Start();
         esitoLink = 1;
       }
@@ -224,11 +235,12 @@ namespace IOB_WIN
         foreach (var device in document.Devices)
         {
           List<MTConnectDevices.DataItem> dataItems = device.GetDataItems();
+          lgInfo("Inizio STEP 02");
           //if (verboseLog)
           //{
           foreach (var dataItem in dataItems)
           {
-            string sVal = $"STEP 02 | Category: {dataItem.Category} | Type: {dataItem.Type} | Id: {dataItem.Id} | Name: {dataItem.Name}";
+            string sVal = $"STEP 03 | Category: {dataItem.Category} | Type: {dataItem.Type} | Id: {dataItem.Id} | Name: {dataItem.Name}";
             lgInfo(sVal);
             try
             {
@@ -248,17 +260,26 @@ namespace IOB_WIN
                 SubType = dataItem.SubType,
                 Units = dataItem.Units
               };
-              // aggiungo
-              elencoDataItems.Add(currMapoDataItem);
+              // aggiungo se non ci fosse
+              if (!elencoDataItems.Contains(currMapoDataItem))
+              {
+                elencoDataItems.Add(currMapoDataItem);
+              }
             }
             catch (Exception exc)
             {
               lgError($"Eccezione in DevicesSuccessful / DataItem:{Environment.NewLine}{exc}");
             }
           }
-          // invio IN BLOCCO il dataItem serializzati...
+        }
+        // invio IN BLOCCO il dataItem serializzati...
+        if (elencoDataItems.Count > 0)
+        {
+          lgInfo("STEP 04 invio dati");
           sendDataItemsList(elencoDataItems);
         }
+        hasReadItems = true;
+        lgInfo($"STEP 05: memorizzati {dataItemMem.Count} oggetti in memoria");
         //}
       }
       else
@@ -437,28 +458,35 @@ namespace IOB_WIN
         {
           // registro non trovato da aggiungere...
           lgInfo($"DataItem non trovato in checkSaveItem: {newValue.DataItemId}");
-          // provo a creare oggetot in memoria...
-          List<machDataItem> elencoDataItems = new List<machDataItem>();
-          int dSamplePeriod = 0;
-          int threshDBand = 0;
-          string uuid = "";
-          var currDataItem = formatDataItem(ref dSamplePeriod, ref threshDBand, ref uuid, newValue);
-          // aggiungo
-          dataItemMem.Add(newValue.DataItemId, currDataItem);
-          // salvo oggetto x registrazione su server MP-IO
-          var currMapoDataItem = new machDataItem()
+          try
           {
-            uuid = newValue.DataItemId,
-            Category = (DataItemCategory)newValue.Category,
-            Name = newValue.Name,
-            Type = newValue.Type,
-            SubType = newValue.SubType,
-            //Units = newValue.Units
-          };
-          // aggiungo
-          elencoDataItems.Add(currMapoDataItem);
-          // invio il dataItem serializzato...
-          sendDataItemsList(elencoDataItems);
+            // provo a creare oggetot in memoria...
+            List<machDataItem> elencoDataItems = new List<machDataItem>();
+            int dSamplePeriod = 0;
+            int threshDBand = 0;
+            string uuid = "";
+            var currDataItem = formatDataItem(ref dSamplePeriod, ref threshDBand, ref uuid, newValue);
+            // aggiungo
+            dataItemMem.Add(newValue.DataItemId, currDataItem);
+            // salvo oggetto x registrazione su server MP-IO
+            var currMapoDataItem = new machDataItem()
+            {
+              uuid = newValue.DataItemId,
+              Category = (DataItemCategory)newValue.Category,
+              Name = newValue.Name,
+              Type = newValue.Type,
+              SubType = newValue.SubType,
+              //Units = newValue.Units
+            };
+            // aggiungo
+            elencoDataItems.Add(currMapoDataItem);
+            // invio il dataItem serializzato...
+            sendDataItemsList(elencoDataItems);
+          }
+          catch (Exception exc)
+          {
+            lgError($"Eccezione in checkSaveSample{Environment.NewLine}{exc}");
+          }
         }
       }
       else
@@ -529,27 +557,34 @@ namespace IOB_WIN
           // registro non trovato da aggiungere...
           lgInfo($"DataItem non trovato in checkSaveSample: {newValue.DataItemId}");
           // provo a creare oggetot in memoria...
-          List<machDataItem> elencoDataItems = new List<machDataItem>();
-          int dSamplePeriod = 0;
-          int threshDBand = 0;
-          string uuid = "";
-          var currDataItem = formatDataItem(ref dSamplePeriod, ref threshDBand, ref uuid, newValue);
-          // aggiungo
-          dataItemMem.Add(newValue.DataItemId, currDataItem);
-          // salvo oggetto x registrazione su server MP-IO
-          var currMapoDataItem = new machDataItem()
+          try
           {
-            uuid = newValue.DataItemId,
-            Category = (DataItemCategory)newValue.Category,
-            Name = newValue.Name,
-            Type = newValue.Type,
-            SubType = newValue.SubType,
-            //Units = newValue.Units
-          };
-          // aggiungo
-          elencoDataItems.Add(currMapoDataItem);
-          // invio il dataItem serializzato...
-          sendDataItemsList(elencoDataItems);
+            List<machDataItem> elencoDataItems = new List<machDataItem>();
+            int dSamplePeriod = 0;
+            int threshDBand = 0;
+            string uuid = "";
+            var currDataItem = formatDataItem(ref dSamplePeriod, ref threshDBand, ref uuid, newValue);
+            // aggiungo
+            dataItemMem.Add(newValue.DataItemId, currDataItem);
+            // salvo oggetto x registrazione su server MP-IO
+            var currMapoDataItem = new machDataItem()
+            {
+              uuid = newValue.DataItemId,
+              Category = (DataItemCategory)newValue.Category,
+              Name = newValue.Name,
+              Type = newValue.Type,
+              SubType = newValue.SubType,
+              //Units = newValue.Units
+            };
+            // aggiungo
+            elencoDataItems.Add(currMapoDataItem);
+            // invio il dataItem serializzato...
+            sendDataItemsList(elencoDataItems);
+          }
+          catch (Exception exc)
+          {
+            lgError($"Eccezione in checkSaveSample{Environment.NewLine}{exc}");
+          }
         }
       }
       else
diff --git a/Jenkinsfile b/Jenkinsfile
index a8264833..672b01f3 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -16,7 +16,7 @@ pipeline {
 
       /* calcolo numero versione... diverso x branch MASTER/DEVELOP */
       script {
-        withEnv(['NEXT_BUILD_NUMBER=560']) {
+        withEnv(['NEXT_BUILD_NUMBER=562']) {
           // env.versionNumber = VersionNumber(versionNumberString : '2.6.${BUILD_DATE_FORMATTED, "yyMM"}.${BUILDS_ALL_TIME}', projectStartDate : '2006-01-01', skipFailedBuilds: true)
           env.versionNumber = VersionNumber(versionNumberString : '2.6.${BUILD_DATE_FORMATTED, "yyMM"}.${BUILDS_ALL_TIME}', projectStartDate : '2006-01-01', skipFailedBuilds: true, overrideBuildsAllTime: '${NEXT_BUILD_NUMBER}')
           env.APP_NAME = 'MAPO-IOB-WIN'