diff --git a/IOB-WIN/IOB-WIN.csproj b/IOB-WIN/IOB-WIN.csproj
index 109dfae5..b8f74fc8 100644
--- a/IOB-WIN/IOB-WIN.csproj
+++ b/IOB-WIN/IOB-WIN.csproj
@@ -234,6 +234,15 @@
     <None Include="DATA\CONF\3015.ini">
       <CopyToOutputDirectory>Always</CopyToOutputDirectory>
     </None>
+    <None Include="DATA\CONF\SIMUL_04.json">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+    <None Include="DATA\CONF\SIMUL_03.json">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+    <None Include="DATA\CONF\SIMUL_02.json">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
     <None Include="DATA\CONF\SIMUL_01.json">
       <CopyToOutputDirectory>Always</CopyToOutputDirectory>
     </None>
diff --git a/IOB-WIN/IobGeneric.cs b/IOB-WIN/IobGeneric.cs
index 086d26a1..859a2deb 100644
--- a/IOB-WIN/IobGeneric.cs
+++ b/IOB-WIN/IobGeneric.cs
@@ -34,6 +34,10 @@ namespace IOB_WIN
     /// </summary>
     public static DateTime dtVetoPing = DateTime.Now;
     /// <summary>
+    /// Indicazione VETO check status IOB x evitare loop troppo stretti...
+    /// </summary>
+    public static DateTime dtVetoCheckIOB = DateTime.Now;
+    /// <summary>
     /// Contapezzi attuale
     /// </summary>
     protected Int32 contapezzi;
@@ -2087,9 +2091,15 @@ namespace IOB_WIN
               MPOnline = false;
               // imposto veto a 10 volte reinvio dati standard...
               dtVetoPing = DateTime.Now.AddMilliseconds(baseUtils.nextPauseSendMSec * 10);
+              utils.dtVetoSend = dtVetoPing;
             }
           }
         }
+        else
+        {
+          // altrimenti passo ultimo valore noto...
+          answ = MPOnline;
+        }
         return answ;
       }
     }
@@ -2101,43 +2111,57 @@ namespace IOB_WIN
       get
       {
         bool answ = false;
-        if (DemoOut)
+        // controllo se ho veto al check...
+        if (dtVetoCheckIOB < DateTime.Now)
         {
-          answ = (QueueIN.Count + QueueFLog.Count >= nMaxSend);
-        }
-        else
-        {
-          try
+          if (DemoOut)
           {
-            // chiamo URL, se restituisce "OK" è enabled!
-            answ = (callUrl(urlIobEnabled, true) == "OK");
-          }
-          catch
-          { }
-        }
-        // verifico SE è variato stato online/offline...
-        if (IobOnline != answ)
-        {
-          // se ORA sono online riporto...
-          if (answ)
-          {
-            lgInfo("IOB ONLINE for server MP/IO");
+            answ = (QueueIN.Count + QueueFLog.Count >= nMaxSend);
           }
           else
           {
-            lgInfo("IOB OFFLINE for server MP/IO");
+            try
+            {
+              // chiamo URL, se restituisce "OK" è enabled!
+              answ = (callUrl(urlIobEnabled, true) == "OK");
+              // salvo status...
+              IobOnline = answ;
+              // se offline imposto veto check a 5 x tempo reinvio...
+              if (!answ)
+              {
+                dtVetoCheckIOB = DateTime.Now.AddMilliseconds(baseUtils.nextPauseSendMSec * 5);
+              }
+            }
+            catch
+            { }
+          }
+          // verifico SE è variato stato online/offline...
+          if (IobOnline != answ)
+          {
+            // se ORA sono online riporto...
+            if (answ)
+            {
+              lgInfo("IOB ONLINE for server MP/IO");
+            }
+            else
+            {
+              lgInfo("IOB OFFLINE for server MP/IO");
+            }
+          }
+          // fix colore
+          if (answ)
+          {
+            parentForm.commSrvActive = 2;
+          }
+          else
+          {
+            parentForm.commSrvActive = 1;
           }
-          // salvo nuovo status...
-          IobOnline = answ;
-        }
-        // fix colore
-        if (answ)
-        {
-          parentForm.commSrvActive = 2;
         }
         else
         {
-          parentForm.commSrvActive = 1;
+          // altrimenti passo ultimo valore noto
+          answ = IobOnline;
         }
         return answ;
       }
diff --git a/Jenkinsfile b/Jenkinsfile
index 485327a9..d818ad0d 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -16,7 +16,7 @@ pipeline {
 
       /* calcolo numero versione... diverso x branch MASTER/DEVELOP */
       script {
-        withEnv(['NEXT_BUILD_NUMBER=485']) {
+        withEnv(['NEXT_BUILD_NUMBER=486']) {
           // 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'