Traceback (most recent call last):
  File "/usr/bin/calibre-parallel", line 8, in <module>
    load_entry_point('calibre==0.6.3', 'console_scripts', 'calibre-parallel')()
  File "/usr/lib/python2.6/dist-packages/calibre/utils/ipc/worker.py", line 80, in main
    name, args, kwargs, desc = conn.recv()
EOFError