Hi all, I have the following reference problem: I have : object A instance of AClass class objects b and c instances of BClass class A.list_of_refered_object = (getattr(self.aq_parent, 'a'), getattr(self.aq_parent, 'b')) When I want to refer b or c from A it works well untill I restart Zope or refresh the product. After restart Zope can`t find the refered objects. All self._p_changed are ok. -- Vincenzo Di Somma - Responsabile Ricerca e Sviluppo - Icube S.r.l. Sede: Via Ridolfi 15 - 56124 Pisa (PI), Italia E-mail: e.disomma@icube.it WWW: www.icube.it Tel: (+39) 050 97 02 07 Fax: (+39) 050 31 36 588