getting sometimes "ERROR: 'NoneType' object is not iterable" when opening chart of accounts
Updating with latest 4.6 from git, I'm noticing upon occasion (not always):
ERROR:tryton.common.common:Traceback (most recent call last):
File "/home/richard/src/git-tryton/tryton/tryton/common/common.py", line 1207, in process
self.callback(return_)
File "/home/richard/src/git-tryton/tryton/tryton/gui/window/wizard.py", line 69, in callback
self.session_id, self.start_state, self.end_state = result
TypeError: 'NoneType' object is not iterable
'NoneType' object is not iterable
client running python 2.7.14