In Warehouse : When Run The Copmpute Schedular :

Problem : In Warehouse : When Run The Copmpute Schedular :
            Warehouse --> Schedular --> Compute Schedular .
             Find out traceback at servar Side :
            ============================================================
             Traceback (most recent call last):
              File "/usr/lib/python2.6/threading.py", line 532, in __bootstrap_inner
                self.run()
              File "/usr/lib/python2.6/threading.py", line 484, in run
                self.__target(*self.__args, **self.__kwargs)
              File "/home/amb/source/addons/trunk/procurement/wizard/schedulers_all.py", line 48, in _procure_calculation_all
                proc_obj.run_scheduler(cr, uid, automatic=proc.automatic, use_new_cursor=cr.dbname,\
              File "/home/amb/source/server/trunk/openerp/osv/orm.py", line 456, in __getattr__
                return self[name]
              File "/home/amb/source/server/trunk/openerp/osv/orm.py", line 369, in __getitem__
                field_values = self._table.read(self._cr, self._uid, ids, field_names, context=self._context, load="_classic_write")
              File "/home/amb/source/server/trunk/openerp/osv/orm.py", line 3197, in read
                result = self._read_flat(cr, user, select, fields, context, load)
              File "/home/amb/source/server/trunk/openerp/osv/orm.py", line 3256, in _read_flat
                cr.execute(query, (tuple(sub_ids),))
              File "/home/amb/source/server/trunk/openerp/sql_db.py", line 152, in wrapper
                raise psycopg2.OperationalError(msg)
            OperationalError: Unable to use a closed cursor.