def METHOD_NAME():
    global vncserver_addr
    if vncserver_addr == -1:
        print("VNC server not running.")
        return
    fnull = open(os.devnull, "w")
    saved_display = os.environ['DISPLAY']
    os.environ['DISPLAY'] = os.environ['ORIG_DISPLAY']
    out = subprocess.Popen(['dmtcp_nocheckpoint',
                            'vncviewer',
                            '-passwd', os.environ['HOME'] + '/.vnc/passwd',
                            ':' + str(vncserver_addr)],
                          stdout=fnull, stderr=fnull)
    os.environ['DISPLAY'] = saved_display