It's just me again... The ZSQL document mentions to define a database method class in a file in the Extensions directory. The ZCMG document says "you cannot define classes or objects in your External Methods and expect to be able to assign them to attributes of Zope objects." This is what I see in my application: I'm doing a SQL query. The result is stored in an array of object my own database method class. I save this array in an FSSession object to be used later on. This later usage results in problems. The array does not consist of objects of my own class (or of class r as defined in RDB.py) but of type extension class Record.Record. So how can I make my class definition persistent? The database method class lives in the Extension directory which means this class is not persistent by definition :-(( But perhaps I just overlooked something very simple. Still praying... Thank you! -- connection reset by Peer _______________________________________________________________________ Dr. Peer Griebel Tel. +49 7581 4831 23 Geschäftsführer Fax. +49 7581 4831 11 Knoll Informationssysteme GmbH http://www.knoll-is.de Dreiköniggasse 17 mailto:peer@knoll-is.de 88348 Saulgau privat: mailto:peer.griebel@gmx.de