Hello I'm trying to work with persistent objects in a PickleDictionary. The objects are not writen into database file - they exists only in memory and they are not persistent. I don't know how to commit new changes. Python code: ... db=BoboPOS.PickleDictionary(db_loc+"databaze2") if db.has_key('customers_db'): customers=db['customers_db'] else: customers=db['customers_db']=Customers() customers.addCustomer('hu','sdf','dsf','sdf','df') #this is test # -works- get_transaction().commit() #ok - this works customer, which is added here is persistent ..but later .. class AdressBook( OFS.SimpleItem.Item, Persistent, Acquisition.Implicit, AccessControl.Role.RoleManager, ): .... def manage_addZakaznik(self,id,firstname,surname,tel,note, REQUEST=None): """ adds a new customer into persistent storage and writes the message """ if REQUEST is not None: customers.addZakaznik(id,firstname,surname,tel,note) get_transaction().commit() return MessageDialog( title='Added', message='zakaznik byl pridan.' , action ='./manage_main', ) #this customer is added into the object 'customers' and I can work with it, but it isn't persistent - after Zope's restart is lost. ------------ Thank's for any informations Jiri Stepan (zope@etnetera.cz)