local variable 'dbver' referenced before assignment

[xa72]

Hi there:
--snip--
$ pg_view -c /path/to/pg_view.conf -i xxx
Traceback (most recent call last):
File "build/bdist.linux-x86_64/egg/pg_view/init.py", line 253, in main
collector = DetachedDiskStatCollector(q, work_directories, dbver)
UnboundLocalError: local variable 'dbver' referenced before assignment
---snap--
Ubuntu 14.04 LTS, 64bit, PG 9.6, single local db (no cluster), running pg_view under user "postgres". pg_view installed from current source with "sudo python setup.py install". pg_view.conf has only the Section [xxx] with one entry: dbname=...
Any ideas?
Alex