IOError: [Errno 2] No such file or directory: './data/bwfiles'

ERROR[Thu Feb 28 21:40:33 2013]:An unexpected error occured.
Traceback (most recent call last):
  File "bwauthority_child.py", line 391, in <module>
    else: main(sys.argv)
  File "bwauthority_child.py", line 331, in main
    min_streams, sql_file)
  File "bwauthority_child.py", line 235, in speedrace
    url = choose_url(start_pct)
  File "bwauthority_child.py", line 105, in choose_url
    f = file("./data/bwfiles", "r")
IOError: [Errno 2] No such file or directory: './data/bwfiles'

Running torflow caf001962.

(Maybe it's ok? But in that case, maybe it shouldn't say that it's an unexpected error?)