odoo 9 community edition ,OpenerpGevent and openerpbackgroundworker service doesn't start after server restart.
Traceback (most recent call last):
File "C:/Bitnami/odoo-9.0-1/apps/odoo\scripts\openerp-server", line 13, in <module>
__import__('pkg_resources').run_script('odoo==9.0-20151109', 'openerp-server')
File "build\bdist.win32\egg\pkg_resources.py", line 517, in run_script
File "build\bdist.win32\egg\pkg_resources.py", line 1436, in run_script
File "c:\bitnami\odoo-9.0-1\apps\odoo\lib\site-packages\odoo-9.0_20151109-py2.7.egg\EGG-INFO\scripts\openerp-server", line 2, in <module>
import openerp
File "C:\Bitnami\odoo-9.0-1\apps\odoo\Lib\site-packages\odoo-9.0_20151109-py2.7.egg\openerp\__init__.py", line 55, in <module>
import addons
File "C:\Bitnami\odoo-9.0-1\apps\odoo\Lib\site-packages\odoo-9.0_20151109-py2.7.egg\openerp\addons\__init__.py", line 2, in <module>
import models
File "C:\Bitnami\odoo-9.0-1\apps\odoo\Lib\site-packages\odoo-9.0_20151109-py2.7.egg\openerp\addons\models\__init__.py", line 2, in <module>
import res_company
File "C:\Bitnami\odoo-9.0-1\apps\odoo\Lib\site-packages\odoo-9.0_20151109-py2.7.egg\openerp\addons\models\res_company.py", line 3, in <module>
from openerp import models, fields, api
File "C:\Bitnami\odoo-9.0-1\apps\odoo\Lib\site-packages\odoo-9.0_20151109-py2.7.egg\openerp\models.py", line 45, in <module>
from . import api
File "C:\Bitnami\odoo-9.0-1\apps\odoo\Lib\site-packages\odoo-9.0_20151109-py2.7.egg\openerp\api.py", line 958, in <module>
from openerp.modules.registry import RegistryManager
File "C:\Bitnami\odoo-9.0-1\apps\odoo\Lib\site-packages\odoo-9.0_20151109-py2.7.egg\openerp\modules\__init__.py", line 8, in <module>
from . import db, graph, loading, migration, module, registry
File "C:\Bitnami\odoo-9.0-1\apps\odoo\Lib\site-packages\odoo-9.0_20151109-py2.7.egg\openerp\modules\graph.py", line 13, in <module>
import openerp.osv as osv
File "C:\Bitnami\odoo-9.0-1\apps\odoo\Lib\site-packages\odoo-9.0_20151109-py2.7.egg\openerp\osv\__init__.py", line 4, in <module>
import osv
File "C:\Bitnami\odoo-9.0-1\apps\odoo\Lib\site-packages\odoo-9.0_20151109-py2.7.egg\openerp\osv\osv.py", line 5, in <module>
from .orm import Model, TransientModel, AbstractModel
File "C:\Bitnami\odoo-9.0-1\apps\odoo\Lib\site-packages\odoo-9.0_20151109-py2.7.egg\openerp\osv\orm.py", line 5, in <module>
from ..models import (
ImportError: cannot import name MetaModel
