I've compiled up a mxODBC DA for use under windows so that multi-threaded odbc drivers can be me used in a multi-threaded way. This works good so far except for one aspect. NULL values are being returned as "None" objects. This seems reasonable but it is not how ZODBC returns results. It will return a NULL as a "Missing" object (whatever that is?). I can't find any documentation to find out what this object is or means. My biggest problem is that the UserDB product doesn't like None objects being return for passwords. It seemed to handle the Missing objects fine. To add to the mystery I noticed that the result object returned by an sql method connected to first ZODBC and then ZmxODBC was of two different types. ZmxODBC was returning a ZRDB.Results object. ZODBC was returning a ZRDB.RDB.DatabaseResults object. The latter is apparently a "Class for reading RDB files" but as this is the only documentation I can find I have no idea how it differs from the ZRDB.Results class or rather why ZODBC returns it and thus has NULL's replaced Missing objects. Can anyone shed any light on any of this? ---- Dylan Jay mailto:djay@avaya.com Avaya Communication Tel: +61 2 9886-8961 Level 5, 15 Talavera Road FAX: +61 2 9352 9224 Nth Ryde NSW 2113 Mobile:+61 409 606 171 AUSTRALIA ICQ: 520341