Hi All, I have an old Zope 2.9.8 instance which has recently started throwing the following unresolved ConflictErrors: Traceback (innermost last): Module Zope2.App.startup, line 173, in zpublisher_exception_hook Module ZPublisher.Publish, line 121, in publish Module Zope2.App.startup, line 240, in commit Module transaction._manager, line 96, in commit Module transaction._transaction, line 380, in commit Module transaction._transaction, line 378, in commit Module transaction._transaction, line 433, in _commitResources Module ZODB.Connection, line 479, in commit Module ZODB.Connection, line 1050, in _commit_savepoint Module tempstorage.TemporaryStorage, line 202, in store ConflictError: database conflict error (oid 0x046a, class Products.Transience.TransientObject.TransientObject, serial this txn started with 0x0387c9f23edea155 2010-07-27 10:26:14.735074, serial currently committed 0x0387c9f28a1ff766 2010-07-27 10:26:32.373016) To my knowledge, the request that throws this isn't touching the session or temp_folder, but I guess something is. How can I find out what code is actually touch this and so causing this conflict? Chris -- Simplistix - Content Management, Batch Processing & Python Consulting - http://www.simplistix.co.uk