You may need to add a dependency on the parent class' module

Hi, I want inherit a view but having the next error in the object product.product OpenERP7 2013-05-05 01:50:07,418 7629 INFO conta openerp.modules.loading: module base: loading objects 2013-05-05 01:50:07,475 7629 INFO conta openerp.modules.loading: module web: loading objects 2013-05-05 01:50:07,477 7629 INFO conta openerp.modules.loading: module web_tests: loading objects 2013-05-05 01:50:07,479 7629 INFO conta openerp.modules.loading: module board: loading objects 2013-05-05 01:50:07,482 7629 INFO conta openerp.modules.loading: module decimal_precision: loading objects 2013-05-05 01:50:07,484 7629 INFO conta openerp.modules.loading: module demo: loading objects 2013-05-05 01:50:07,489 7629 ERROR conta openerp.netsvc: The model "product.product" specifies an unexisting parent class "product.product" You may need to add a dependency on the parent class' module. Traceback (most recent call last): File "/usr/lib/pymodules/python2.7/openerp/netsvc.py", line 361, in dispatch_rpc result = ExportService.getService(service_name).dispatch(method, params) File "/usr/lib/pymodules/python2.7/openerp/service/web_services.py", line 593, in dispatch security.check(db,uid,passwd) File "/usr/lib/pymodules/python2.7/openerp/service/security.py", line 40, in check pool = pooler.get_pool(db) File "/usr/lib/pymodules/python2.7/openerp/pooler.py", line 50, in get_pool return get_db_and_pool(db_name, force_demo, status, update_module)[1] File "/usr/lib/pymodules/python2.7/openerp/pooler.py", line 33, in get_db_and_pool registry = RegistryManager.get(db_name, force_demo, status, update_module, pooljobs) File "/usr/lib/pymodules/python2.7/openerp/modules/registry.py", line 156, in get update_module, pooljobs) File "/usr/lib/pymodules/python2.7/openerp/modules/registry.py", line 178, in new openerp.modules.load_modules(registry.db, force_demo, status, update_module) File "/usr/lib/pymodules/python2.7/openerp/modules/loading.py", line 333, in load_modules processed = load_marked_modules(cr, graph, states_to_load, force, status, report, loaded_modules) File "/usr/lib/pymodules/python2.7/openerp/modules/loading.py", line 248, in load_marked_modules loaded, processed = load_module_graph(cr, graph, progressdict, report=report, skip_modules=loaded_modules) File "/usr/lib/pymodules/python2.7/openerp/modules/loading.py", line 158, in load_module_graph models = pool.load(cr, package) File "/usr/lib/pymodules/python2.7/openerp/modules/registry.py", line 104, in load res.append(cls.create_instance(self, cr)) File "/usr/lib/pymodules/python2.7/openerp/osv/orm.py", line 880, in create_instance 'You may need to add a dependency on the parent class\' module.' % (name, parent_name)) TypeError: The model "product.product" specifies an unexisting parent class "product.product" You may need to add a dependency on the parent class' module. 2013-05-05 01:50:07,496 7629 INFO conta werkzeug: 192.168.1.65 - - [05/May/2013 01:50:07] "POST /web/dataset/call_kw/ir.module.module:write HTTP/1.1" 200 - products_viewssproduct.product