diff --git a/WebDoorCreator.CamSrv/ProcMan.vb b/WebDoorCreator.CamSrv/ProcMan.vb
index 4051830..bed064b 100644
--- a/WebDoorCreator.CamSrv/ProcMan.vb
+++ b/WebDoorCreator.CamSrv/ProcMan.vb
@@ -181,16 +181,18 @@ Public Class ProcMan
          bStopMainProcess = m_bStopProcess
          Dim bOk As Boolean = False
          While Not bOk
-            ' ogni 30 secondi
-            If n30SecCounter = 30 OrElse n30SecCounter = 0 Then
-               ' verifica connessione
-               Dim risultatoPing As PingReply = currWDC.testPing
-               bOk = risultatoPing.Status = IPStatus.Success
-               If bOk Then
-                  bOk = currWDC.testAlive
+            If Not bStopMainProcess AndAlso Not m_bStopProcess Then
+               ' ogni 30 secondi
+               If n30SecCounter = 30 OrElse n30SecCounter = 0 Then
+                  ' verifica connessione
+                  Dim risultatoPing As PingReply = currWDC.testPing
+                  bOk = risultatoPing.Status = IPStatus.Success
+                  If bOk Then
+                     bOk = currWDC.testAlive
+                  End If
+               Else
+                  bOk = True
                End If
-            Else
-               bOk = True
             End If
             ' se connessione non ok o processo fermato, fermo i thread
             If Not bOk OrElse bStopMainProcess Then
@@ -239,13 +241,19 @@ Public Class ProcMan
          ' se qualche processo in stop, lo faccio ripartire
          For ThreadIndex = 0 To ThreadList.Count - 1
             Dim Thread = ThreadList(ThreadIndex)
-            If Thread.ThreadState = ThreadState.Stopped OrElse Thread.ThreadState = ThreadState.Aborted OrElse
+            If Not IsNothing(Thread) Then
+               If Thread.ThreadState = ThreadState.Stopped OrElse Thread.ThreadState = ThreadState.Aborted OrElse
                Thread.ThreadState = ThreadState.Suspended Then
-               Thread.Abort()
-               Dim ThreadId As Integer = ThreadIndex
-               Thread = New Thread(Sub()
-                                      ThreadFunction(ThreadId)
-                                   End Sub)
+                  Thread.Abort()
+                  Thread.Sleep(1000)
+                  While Not Thread.ThreadState = ThreadState.Aborted
+                     Thread.Sleep(1000)
+                  End While
+                  Dim ThreadId As Integer = ThreadIndex
+                  Thread = New Thread(Sub()
+                                         ThreadFunction(ThreadId)
+                                      End Sub)
+               End If
             End If
          Next
          If n30SecCounter <= 30 Then
@@ -291,9 +299,9 @@ Public Class ProcMan
                                 Sub(o)
                                    'verifico thread attivi e se calano --> riavvia..
                                    If ThreadCount() <> m_MaxCamInstances And Not m_bStopProcess Then
-                                      stopAllThreads()
-                                      Thread.Sleep(100)
-                                      startAllThreads()
+                                      'stopAllThreads()
+                                      'Thread.Sleep(100)
+                                      'startAllThreads()
                                    End If
 
                                    lblRunning.Text = $"threads: {ThreadCount()}/{m_MaxCamInstances}"
@@ -324,6 +332,7 @@ Public Class ProcMan
 
    Private Sub startAllThreads()
       m_bStopProcess = False
+      m_bExecutionThreadStoped = False
       m_ExecutionThread = New Thread(Sub()
                                         ExecutionProcess()
                                      End Sub)
@@ -579,7 +588,11 @@ Public Class ProcMan
       m_bStopProcess = True
 
       While Not m_bExecutionThreadStoped
-         Thread.Sleep(20)
+         Thread.Sleep(100)
+      End While
+      m_ExecutionThread.Abort()
+      While Not m_ExecutionThread.ThreadState = ThreadState.Aborted
+         Thread.Sleep(100)
       End While
       m_ExecutionThread = Nothing
       ' fix timer
@@ -918,12 +931,14 @@ Public Class ProcMan
    Private Sub CheckStartAutoRestart()
       TimerCheck.Enabled = chkAutoRestart.Checked
       If chkAutoRestart.Checked Then
-         If m_ExecutionThread.ThreadState = ThreadState.Aborted OrElse m_ExecutionThread.ThreadState = ThreadState.Stopped OrElse
-            m_ExecutionThread.ThreadState = ThreadState.Suspended Then
+         If Not IsNothing(m_ExecutionThread) AndAlso (m_ExecutionThread.ThreadState = ThreadState.Aborted OrElse m_ExecutionThread.ThreadState = ThreadState.Stopped OrElse
+            m_ExecutionThread.ThreadState = ThreadState.Suspended) Then
             stopAllThreads()
             Thread.Sleep(200)
-            m_ExecutionThread.Abort()
-            Thread.Sleep(200)
+            While Not IsNothing(m_ExecutionThread)
+               Thread.Sleep(100)
+            End While
+            Thread.Sleep(100)
             startAllThreads()
          End If
          TimerCheck.Start()
@@ -938,8 +953,14 @@ Public Class ProcMan
 
    Private Sub restartAll()
       ' eseguo riavvio forzato ogni 30 sec!
-      stopAllThreads()
-      Task.Delay(500)
+      If Not IsNothing(m_ExecutionThread) Then
+         stopAllThreads()
+         Thread.Sleep(200)
+         While Not IsNothing(m_ExecutionThread)
+            Thread.Sleep(100)
+         End While
+         Thread.Sleep(100)
+      End If
       startAllThreads()
    End Sub