trees directory

[0s1nj3ct0r]

when test ftptree at command line: ./crawltree.py sites/ucsc.json it responses: File "./crawltree.py", line 231, in with open(config['tree_file'], 'w') as op: IOError: [Errno 2] No such file or directory: u'trees/ucsc.json'

where are trees/ucsc.json files?