# portstat 
Traceback (most recent call last):
  File "/usr/bin/portstat", line 320, in <module>
    main()
  File "/usr/bin/portstat", line 273, in main
    cnstat_dict = portstat.get_cnstat()
  File "/usr/bin/portstat", line 77, in get_cnstat
    cnstat_dict[port] = get_counters(counter_port_name_map[port])
  File "/usr/bin/portstat", line 67, in get_counters
    fields[pos] += int(self.db.get(self.db.COUNTERS_DB, full_table_id, counter_name))
TypeError: int() argument must be a string or a number, not 'NoneType'