$ trytond -c /etc/trytond/trytond.conf -d trytondb --all
Traceback (most recent call last):
File "/usr/local/bin/trytond", line 80, in <module>
server.TrytonServer(options).run()
File "/usr/local/lib/python2.7/site-packages/trytond/server.py", line 84, in run
with Transaction().start(db_name, 0) as transaction:
File "/usr/local/lib/python2.7/site-packages/trytond/transaction.py", line 75, in start
Database = backend.get('Database')
File "/usr/local/lib/python2.7/site-packages/trytond/backend/__init__.py", line 30, in get
ep, = pkg_resources.iter_entry_points('trytond.backend', db_type)
ValueError: need more than 0 values to unpack
Any advice as to what I've got wrong here is much appreciated.