KeyError in self.node_map[exit_node[1:]]

My ExitAuthority died with Traceback:

ERROR[Fri Sep 23 06:55:02 2011]:An unexpected error occured.
Traceback (most recent call last):
  File "soat.py", line 2914, in <module>
    main(sys.argv)
  File "soat.py", line 2855, in main
    result = test.run_test()
  File "soat.py", line 1085, in run_test
    result = self.check_http(address,filetype)
  File "soat.py", line 1251, in check_http
    result = HttpTestResult(self.node_map[exit_node[1:]],
KeyError: 'E7C49248095E77968BA4390DA2BBAC9D7E4560F3'
INFO[Fri Sep 23 06:55:02 2011]:Resetting __LeaveStreamsUnattached=0 and FetchUselessDescriptors=1