[Zope] Zope failed. Ok after rm /var/lib/zope/var/cound*

Hello, We run a Zope website for almost a year now and the last week Zope failed twice. Instead of the homepage, we got an error message. Strange thing is that the management pages and a password protected part of the site worked ok. I could get Zope working by: 1) Shutting Zope down 2) Deleting the file /var/lib/zope/var/cound.998308977.097.counter 3) Starting Zope What's so special about this cound* file? This is the version we are running: Zope Version Zope 2.3.0 (source release, python 1.5.2, linux2) Python Version 1.5.2 (#0, Apr 3 2000, 14:46:48) [GCC 2.95.2 20000313 (Debian GNU/Linux)] System Platform linux2 Thanks, Edwin Martin.