Pre-mortem data:
Traceback (most recent call last):
File "neo/master/app.py", line 172, in run
self._run()
File "neo/master/app.py", line 180, in _run
self.listening_conn = ListeningConnection(self, None, self.server)
File "neo/lib/connection.py", line 298, in __init__
connector.makeListeningConnection()
File "neo/lib/connector.py", line 133, in makeListeningConnection
self._error('listen', e)
File "neo/lib/connector.py", line 93, in _error
raise ConnectorException
ConnectorException
Traceback (most recent call last):
  File "neomaster", line 50, in <module>
    sys.exit(neo.scripts.neomaster.main())
  File "neo/scripts/neomaster.py", line 31, in main
    app.run()
  File "neo/master/app.py", line 175, in run
    self.log()
  File "neo/master/app.py", line 167, in log
    if self.pt is not None:
AttributeError: 'Application' object has no attribute 'pt'