Hi please tell me how to fix this error:
Server Traceback (most recent call last): File "/home/erp_user/openerp/production/server/openerp/addons/web/session.py", line 89, in send return openerp.netsvc.dispatch_rpc(service_name, method, args) File "/home/erp_user/openerp/production/server/openerp/netsvc.py", line 292, in dispatch_rpc result = ExportService.getService(service_name).dispatch(method, params) File "/home/erp_user/openerp/production/server/openerp/service/web_services.py", line 626, in dispatch res = fn(db, uid, params) File "/home/erp_user/openerp/production/server/openerp/osv/osv.py", line 188, in execute_kw return self.execute(db, uid, obj, method, *args, *kw or {}) File "/home/erp_user/openerp/production/server/openerp/osv/osv.py", line 131, in wrapper return f(self, dbname, args, *kwargs) File "/home/erp_user/openerp/production/server/openerp/osv/osv.py", line 197, in execute res = self.execute_cr(cr, uid, obj, method, args, *kw) File "/home/erp_user/openerp/production/server/openerp/osv/osv.py", line 185, in execute_cr return getattr(object, method)(cr, uid, args, *kw) File "/home/erp_user/openerp/production/server/openerp/addons/base/module/module.py", line 495, in button_immediate_uninstall return self._button_immediate_function(cr, uid, ids, self.button_uninstall, context=context) File "/home/erp_user/openerp/production/server/openerp/addons/base/module/module.py", line 475, in _button_immediate_function _, pool = pooler.restart_pool(cr.dbname, update_module=True) File "/home/erp_user/openerp/production/server/openerp/pooler.py", line 39, in restart_pool registry = RegistryManager.new(db_name, force_demo, status, update_module) File "/home/erp_user/openerp/production/server/openerp/modules/registry.py", line 218, in new openerp.modules.load_modules(registry.db, force_demo, status, update_module) File "/home/erp_user/openerp/production/server/openerp/modules/loading.py", line 413, in load_modules pool.get('ir.module.module').module_uninstall(cr, SUPERUSER_ID, mod_ids_to_remove) File "/home/erp_user/openerp/production/server/openerp/addons/base/module/module.py", line 439, in module_uninstall ir_model_constraint._module_data_uninstall(cr, uid, constraint_ids, context) File "/home/erp_user/openerp/production/server/openerp/addons/base/ir/ir_model.py", line 532, in _module_data_uninstall WHERE cs.contype=%s and cs.conname=%s and cl.relname=%s""", ('f', name, model_obj._table)) AttributeError: 'NoneType' object has no attribute '_table'
