Hi all, As discussed here : http://mail.zope.org/pipermail/zope/2007-January/170151.html and continued here : http://mail.zope.org/pipermail/zope/2007-January/170156.html I am experiencing issues regarding a database ConflictError on session objects. I use zope 2.9.0 python 2.4.2, and the code of the MultiDB support has been patched (as suggested by Florent Guillaume) http://mail.zope.org/pipermail/zodb-dev/2006-January/009737.html My main concern is to debug my application where, on every couple of requests coming from two different browsers at the same time (before the first request is , one of them wins and the other always fails and raises a conflict error. It is not a ReadConflictError, nor a WriteConflictError. It is a "ConflictError: database conflict error". I am aware that conflicts occure up to 20% of the time, but in my case it is almost 100% in this specific situation ! If I do not use the session object in my code, I have no errors at all and everything just goes fine. Any idea on how to debug this ? Florent, maybe ? someone help me ! I am stuck on this for 2 weeks now. NOTE : I do not use Zeo, nor frames. Thanks, Y.Chaouche