Hi all, In the zope book, sessions chapter, is written: "Manually Invalidating A Session Data Object Developers can manually invalidate a session data object. When a session data object is invalidated, it will be flushed from the system, and will not be returned by subsequent references to REQUEST.SESSION or getSessionData(). " and : "...subsequent references to REQUEST.SESSION in this same request will return a new session data object." I would like to be able to invalidate the session object, and then create a new session with a new key, to be accessed in the next request. But I find that when invalidating a session data object, I can *still* access the old session data in subsequent references to REQUEST.SESSION, in the same request that is. I do not get a new session data object, as I should according to the zope book. And therefore I can not reference the new keys I create in the following requests. Has anyone got a solution for this problem ? It seems the invalidation goes on "between" requests. Is this an error with the sessioning machinery or in the zope book ? Below there are three test scripts, that shows what is going on. greetings, Sune B. Woeller file test1.py: ****** s = context.REQUEST.SESSION s['mykey']='myvalue' print "Page 1, add a key to session.<br />" print "session : <br />" print s print "<br /><br />" print '<a href ="test2">Page 2, invalidate session and add a new key</a><br />' print '<a href ="test3">Page 3, show session</a><br />' return printed ***** file test2.py: ***** s = context.REQUEST.SESSION print "Page 2, invalidate session and add a new key.<br />" s.invalidate() s['mySecondKey']='mySecondValue' print "session after invalidate: <br />" print s print "<br /><br />" print '<a href ="test1">Page 1, add a key to session</a><br />' print '<a href ="test3">Page 3, show session</a><br />' return printed ***** file test3.py: ***** s = context.REQUEST.SESSION print "Page 3, show session<br />" print "session : <br />" print s print "<br /><br />" print '<a href ="test1">Page 1</a><br />' print '<a href ="test2">Page 2</a><br />' return printed