Bonjour, Pouvez-vous m'aider sur cette erreur SVP. ubuntu :14.04LTS openstack : juno *root@openstack:~# neutron-db-manage --config-file /etc/neutron/neutron.conf *--config-file /etc/neutron/plugins/ml2/ml2_conf.ini upgrade juno No handlers could be found for logger "neutron.common.legacy" Traceback (most recent call last): File "/usr/bin/neutron-db-manage", line 10, in <module> sys.exit(main()) File "/usr/lib/python2.7/dist-packages/neutron/db/migration/cli.py", line 169, in main CONF.command.func(config, CONF.command.name) File "/usr/lib/python2.7/dist-packages/neutron/db/migration/cli.py", line 82, in do_upgrade_downgrade do_alembic_command(config, cmd, revision, sql=CONF.command.sql) File "/usr/lib/python2.7/dist-packages/neutron/db/migration/cli.py", line 60, in do_alembic_command getattr(alembic_command, cmd)(config, *args, **kwargs) File "/usr/lib/python2.7/dist-packages/alembic/command.py", line 124, in upgrade script.run_env() File "/usr/lib/python2.7/dist-packages/alembic/script.py", line 199, in run_env util.load_python_file(self.dir, 'env.py') File "/usr/lib/python2.7/dist-packages/alembic/util.py", line 199, in load_python_file module = load_module(module_id, path) File "/usr/lib/python2.7/dist-packages/alembic/compat.py", line 55, in load_module mod = imp.load_source(module_id, path, fp) File "/usr/lib/python2.7/dist-packages/neutron/db/migration/alembic_migrations/env.py", line 42, in <module> importutils.import_class(class_path) File "/usr/lib/python2.7/dist-packages/neutron/openstack/common/importutils.py", line 33, in import_class traceback.format_exception(*sys.exc_info()))) ImportError: Class router cannot be found (['Traceback (most recent call last):\n', ' File "/usr/lib/python2.7/dist-packages/neutron/openstack/common/importutils.py", line 28, in import_class\n __import__(mod_str)\n', 'ValueError: Empty module name\n']) merci d'avance Ibrahim