/home/robert/src/tryton-trunk/trytond/trytond/protocols/jsonrpc.py(123)_marshaled_dispatch()
-> response['result'] = dispatch_method(method, params)
  /home/robert/src/tryton-trunk/trytond/trytond/protocols/jsonrpc.py(156)_dispatch()
-> res = dispatch(*args)
  /home/robert/src/tryton-trunk/trytond/trytond/protocols/dispatcher.py(92)dispatch()
-> return create(*args, **kwargs)
  /home/robert/src/tryton-trunk/trytond/trytond/protocols/dispatcher.py(224)create()
-> pool.init(update=True, lang=[lang])
  /home/robert/src/tryton-trunk/trytond/trytond/pool.py(124)init()
-> self.start()
  /home/robert/src/tryton-trunk/trytond/trytond/pool.py(75)start()
-> register_classes()
  /home/robert/src/tryton-trunk/trytond/trytond/modules/__init__.py(322)register_classes()
-> import trytond.ir
  /home/robert/src/tryton-trunk/trytond/trytond/ir/__init__.py(11)<module>()
-> from .model import *
  /home/robert/src/tryton-trunk/trytond/trytond/ir/model.py(527)<module>()
-> ModelFieldAccess()
  /home/robert/src/tryton-trunk/trytond/trytond/model/modelstorage.py(1109)__init__()
-> super(ModelStorage, self).__init__(id, **kwargs)
  /home/robert/src/tryton-trunk/trytond/trytond/model/model.py(581)__init__()
-> self._values = None
  /home/robert/src/tryton-trunk/trytond/trytond/model/model.py(622)__setattr__()
-> if (name not in self._fields
  /home/robert/src/tryton-trunk/trytond/trytond/model/modelstorage.py(1136)__getattr__()
-> return super(ModelStorage, self).__getattr__(name)
  /home/robert/src/tryton-trunk/trytond/trytond/model/model.py(600)__getattr__()
-> if (name not in self._fields
  /home/robert/src/tryton-trunk/trytond/trytond/model/modelstorage.py(1136)__getattr__()
-> return super(ModelStorage, self).__getattr__(name)
...