Warm greetings, I have installed openerp 7 on my ubuntu 12.4 and is working fine. I have also configured eclipse and pydev, however, when I run openerp-server on eclipse to start openerp, I get the following error. I need your help to resolve this error.

Traceback (most recent call last): File "/opt/openerp/server/openerp-server", line 5, in <module> openerp.cli.main() File "/opt/openerp/server/openerp/cli/__init__.py", line 51, in main __import__(m) File "/opt/openerp/server/openerp/modules/module.py", line 133, in load_module mod = imp.load_module('openerp.addons.' + module_part, f, path, descr) File "/opt/openerp/server/openerp/addons/base_action_rule/__init__.py", line 23, in <module> import test_models File "/opt/openerp/server/openerp/addons/base_action_rule/test_models.py", line 1, in <module> from osv import osv, fields ImportError: No module named osv