** Message: function call error
Traceback (most recent call last):
  File "/usr/lib/mysql-workbench/modules/wb_admin_grt.py", line 133, in openAdministrator
    do_open_administrator(server_instance)
  File "/usr/lib/mysql-workbench/modules/wb_admin_grt.py", line 109, in do_open_administrator
    adminTab = AdministratorTab(server_instance)
  File "/usr/lib/mysql-workbench/modules/wb_admin_grt.py", line 75, in __init__
    self.monitor = wb_admin_monitor.WbAdminMonitor(server_instance_settings, self.ctrl_be)
  File "/usr/lib/mysql-workbench/modules/wb_admin_monitor.py", line 126, in __init__
    mem = self.mon_be.run('get_mem_total').strip(" \r\t\n.,:;")
  File "/usr/lib/mysql-workbench/modules/wba_monitor_be.py", line 482, in run
    result = self.ctrl_be.execute(self.commands[name], sudo = False, password = None)
  File "/usr/lib/mysql-workbench/modules/wb_admin_control_be.py", line 557, in execute
    result = self.ssh.run_cmd(self.wrap_command(script, sudo), sudo, password)
AttributeError: 'NoneType' object has no attribute 'run_cmd'
Exception in thread Thread-2:
Traceback (most recent call last):
  File "/usr/lib/python2.6/threading.py", line 525, in __bootstrap_inner
    self.run()
  File "/usr/lib/python2.6/threading.py", line 477, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/usr/lib/mysql-workbench/modules/wba_monitor_be.py", line 495, in poll_sources
    cmd.poll()
  File "/usr/lib/mysql-workbench/modules/wba_monitor_be.py", line 42, in poll
    result = self.ctrl_be.execute(script = self.cmds, sudo = False, password = None)
  File "/usr/lib/mysql-workbench/modules/wb_admin_control_be.py", line 557, in execute
    result = self.ssh.run_cmd(self.wrap_command(script, sudo), sudo, password)
AttributeError: 'NoneType' object has no attribute 'run_cmd'