Hi all I've got some pages in my Zope application that display results of SQL query (results returned by Z-SQL Method) and check for existence of some data in SESSION object. There is nothing more on the pages but one thing - pages are refreshed every 30 seconds. I also have some users (really not many) that constantly monitor these pages. The last thing I've got is some error messages. The error message that displays on page looks like: An error was encountered while publishing this resource. ZODB.POSException.ConflictError Sorry, a site error occurred. Traceback (innermost last): ° Module ZPublisher.Publish, line 150, in publish_module ° Module ZPublisher.Publish, line 127, in publish ° Module ZPublisher.Publish, line 127, in publish ° Module ZPublisher.Publish, line 127, in publish ° Module ZPublisher.Publish, line 122, in publish ° Module Zope.App.startup, line 142, in zpublisher_exception_hook ° Module ZPublisher.Publish, line 102, in publish ° Module Zope.App.startup, line 200, in commit ° Module ZODB.Transaction, line 235, in commit ° Module ZODB.Transaction, line 349, in _commit_objects ° Module ZODB.Connection, line 391, in commit ° __traceback_info__: (('BTrees.OOBTree', 'OOBTree'), '\x00\x00\x00\x00\x00\x00\x01\xcd', '') ° Module Products.TemporaryFolder.TemporaryStorage, line 134, in store ConflictError: database conflict error (oid 00000000000001cd, serial was 034b62206010624c, now 034b621e679953b3) This error usually disappears after refreshing the page (but confuses the users). Some of error messages that are logged in my "stupid" log: 2003-03-06T09:50:36 INFO(0) ZODB conflict error at /ctt/cmp/info/yesterday/midday/index_html (138 conflicts since startup at 2003-03-05T16:20:08) ------ 2003-03-06T09:52:29 INFO(0) ZODB conflict error at /ctt/firm/props (139 conflicts since startup at 2003-03-05T16:20:08) ------ 2003-03-06T09:52:39 INFO(0) ZODB conflict error at /ctt/firm/props (140 conflicts since startup at 2003-03-05T16:20:08) ------ 2003-03-06T09:52:49 INFO(0) ZODB conflict error at /ctt/firm/index_html (141 conflicts since startup at 2003-03-05T16:20:08) ------ 2003-03-06T09:53:08 INFO(0) ZODB conflict error at /ctt/cmp/info/yesterday/index_html (142 conflicts since startup at 2003-03-05T16:20:08) I have searched mailing lists, but I didn't find the answer for the question - what's going on? and what interests me most: what to do with this? I've found some sugestions that such errors called read conflicts may be caused by using the session. Is that true? Why the session? I don't think that I can stop using session object. Any more suggestions? Any solutions? There must be any simple solution - my app has only few users! Thanks -- Jakub Wisniowski