Dear Zope Users: I have upgraded to FSSession 0.4.2 lately and occasionally run into the same problem several times. Each time it costs me a zope down. I do really need some help... Zope complains an error type "OSError" and throws the error value saying [Errno 21] Is a directory: '/usr/local/zope/var/FSSession/' occasionally since a recent upgrade of FSSession product to 0.4.2. Following that error will be a series of TransactionErrors for each and every request Zope received. And only a zope restart could help zope resume its operations. Since this error only comes up occasionally, I'm completely clueless on solving it. My environment is RedHat Linux 6.2 + Zope 2.1.6. The traceback information looks like this... Traceback (innermost last): File /usr/local/Zope-2.1.6-src/lib/python/ZPublisher/Publish.py, line 169, in publish File /usr/local/Zope-2.1.6-src/lib/python/ZODB/Transaction.py, line 275, in co mmit File /usr/local/Zope-2.1.6-src/lib/python/Shared/DC/ZRDB/TM.py, line 120, in t pc_finish (Object: TM) File /usr/local/zope/lib/python/Products/FSSession/FSSession.py, line 87, in _ finish (Object: TM) File /usr/local/zope/lib/python/Products/FSSession/FSSession.py, line 208, in final_commit (Object: FSSession) OSError: [Errno 21] Is a directory: '/usr/local/zope/var/FSSession/' Any help will be very appreciative! Chien-pin