Hi, I just wonder if anyone can help me with my problem. Recently, I've been working on creating a ZOPE product which requires periodic access to my Sybase. I have created a thread process using the Threading module. There is no problem of periodically wake up the thread and print something to the screen. So, I guess I have no problem with thread programming under ZOPE. However, when I add some database related routines to the thread, problems started to occur. I sometimes got '... not connected to the database'. When I did an SQL 'update', nothing has been updated on the database server when I actually looked into the database using isql. After a whole day of trial & error, now I've got 'ZOPE Memory Error'! I just wonder what has gone wrong. I really have no clue and my deadline is pressing :( 1) I want to know what is the proper way of using thread under ZOPE. 2) Is there any critical limitation of SybaseDAv2? 3) Can SybaseDAv2 & Threading live together happily? 4) What the role of ZODB in such situation? Thanks a million if anyone can help! Regards, Nick