I am using to following to restarting : sudo /etc/init.d/openerp-server restart and having no error message. I try to stop, delete the /var/run/openerp.pid , then start the server, upgrade my module, but stil no change... it's the old code that is executed. How can the server execute the old code ? There must be some cache somewhere ?

Iexecuted the : "sudo /etc/init.d/openerp-server stop" and then "ps aux | grep openerp", My god, so many open process with OpenERP as a user.... I will try to kill all of them, I'll keep update

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I confirmed, that the command sudo /etc/init.d/openerp-server restart sometimes doesn't close the connection... thx for your help.