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Thank you for your answer, after change , this error: (nova.root): TRACE: IllegalFlagValue: flag --network_size=<64>: invalid literal for long()

was solved; but another error occurs like this:

[root@localhost ~]# nova-manage --flagfile /etc/nova/nova.conf db sync 2011-02-17 09:09:51,883 CRITICAL nova.root [-] cannot import name exceptions (nova.root): TRACE: Traceback (most recent call last): (nova.root): TRACE: File "/usr/bin/nova-manage", line 5, in <module> (nova.root): TRACE: pkg_resources.run_script('nova==2011.1', 'nova-manage') (nova.root): TRACE: File "/usr/lib/python2.6/site-packages/setuptools-0.6c11-py2.6.egg/pkg_resources.py", line 489, in run_script (nova.root): TRACE: self.require(requires)[0].run_script(script_name, ns) (nova.root): TRACE: File "/usr/lib/python2.6/site-packages/setuptools-0.6c11-py2.6.egg/pkg_resources.py", line 1207, in run_script (nova.root): TRACE: execfile(script_filename, namespace, namespace) (nova.root): TRACE: File "/usr/lib/python2.6/site-packages/nova-2011.1-py2.6.egg/EGG-INFO/scripts/nova-manage", line 694, in <module> (nova.root): TRACE: main() (nova.root): TRACE: File "/usr/lib/python2.6/site-packages/nova-2011.1-py2.6.egg/EGG-INFO/scripts/nova-manage", line 686, in main (nova.root): TRACE: fn(*argv) (nova.root): TRACE: File "/usr/lib/python2.6/site-packages/nova-2011.1-py2.6.egg/EGG-INFO/scripts/nova-manage", line 565, in sync (nova.root): TRACE: return migration.db_sync(version) (nova.root): TRACE: File "/usr/lib/python2.6/site-packages/nova-2011.1-py2.6.egg/nova/db/migration.py", line 33, in db_sync (nova.root): TRACE: return IMPL.db_sync(version=version) (nova.root): TRACE: File "/usr/lib/python2.6/site-packages/nova-2011.1-py2.6.egg/nova/utils.py", line 331, in __getattr__ (nova.root): TRACE: backend = self.__get_backend() (nova.root): TRACE: File "/usr/lib/python2.6/site-packages/nova-2011.1-py2.6.egg/nova/utils.py", line 326, in __get_backend (nova.root): TRACE: self.__backend = __import__(name, None, None, fromlist) (nova.root): TRACE: File "/usr/lib/python2.6/site-packages/nova-2011.1-py2.6.egg/nova/db/sqlalchemy/migration.py", line 25, in <module> (nova.root): TRACE: from migrate.versioning import exceptions as versioning_exceptions (nova.root): TRACE: ImportError: cannot import name exceptions (nova.root): TRACE:

then, I used "easy_install-2.6 exception" to download relational package ,but can not found url address.

what can I do ???