I had a corrupted file which generated an invalid acoustID (fpcalc had trouble reading the file)

based on fpcalc output,

http://api.acoustid.org/v2/lookup?client=8XaBELgH&duration=170&fingerprint=AQAAAA should be the lookup URL.

Generates the following error:
E: 140001218299648 12:35:20 Network request error for http://api.acoustid.org:80/v2/lookup: Error downloading http://api.acoustid.org:80/v2/lookup - server replied: BAD REQUEST (QT code 299, HTTP code 400)
Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/picard/webservice.py", line 221, in _process_reply
handler(xml_handler.document, reply, error)
File "/usr/lib/python2.7/dist-packages/picard/acoustid.py", line 99, in _on_lookup_finished
results = document.response[0].results[0].children.get('result')
File "/usr/lib/python2.7/dist-packages/picard/webservice.py", line 75, in _getattr_
raise AttributeError, name
AttributeError: results