Included script hanging after called from GUI

[Total_newbie]

Hi,

I have created a basic GUI(master.au3) which contains a button that calls a specific function from a Include file(slave.au3).

The problem is that the execution of the command netstat -a >> netstat-a.log hangs, apparently doesn't run properly and also does not return control to the GUI.

I made a test where I call the same function from the included script using one main script and it works perfectly. I think I'm missing something regarding the GUI piece.

Can somebody help me?

Thanks

Below are the two codes that I'm using.

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;scriptname=master.au3
Opt("GUIOnEventMode", 1) 
#include <slave.au3>
#include <GUIConstants.au3>
$mainwindow = GUICreate("Livelab Tool", 300, 200)
GUISetOnEvent($GUI_EVENT_CLOSE, "_CloseClicked") 
GUISetState(@SW_SHOW,$mainwindow)
$button = GUICtrlCreateButton("Run", 20, 70, 80)
While 1
  Sleep(1000) ; Idle around
WEnd
GUICtrlSetOnEvent($button, "_MainSlave")
Func _CloseClicked()
  Exit
EndFunc

;scriptname: slave.au3
#include <Constants.au3>; Required for $STDERR_CHILD use
Func _RunCommand($command,$tool)
    
    ConsoleWrite(" [i] Starting " & $tool & @CRLF)
    $ourproc = Run(@ComSpec & " /c " & $command, "", @SW_HIDE,$STDERR_CHILD)    

    While 1
        $line = StderrRead($ourproc)
        If @error Then ExitLoop
        ConsoleWrite(" [X] WARNING: " & $line)
    Wend
EndFunc

Func _MainSlave()
    Consolewrite("This is the _MainSlave function")
;Running NETSTAT
    $command = "netstat -a >> netstat-a.log"
    $tool="NETSTAT"
    _RunCommand($command,$tool)
EndFunc