Source path:  /tmp/DE20/
Limit processing to destination frame path started with /tmp/emdata2/frames
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Traceback (most recent call last):
  File "/usr/lib/python2.6/site-packages/leginon//rawtransfer.py", line 275, in <module>
    run()
  File "/usr/lib/python2.6/site-packages/leginon//rawtransfer.py", line 270, in run
    run_once(src_path,params['camera_host'],dst_head,method=params['method'])
  File "/usr/lib/python2.6/site-packages/leginon//rawtransfer.py", line 191, in run_once
    names = os.listdir(parent_src_path)
OSError: [Errno 112] Host is down: '/tmp/DE20/'