Hi, I was so happy to install in production a Zope2. It works superfine with Zserver on my PC and RH6.0 . when I tried to install Zope2 on my production machine ( My config is PC i686, RH5.2) I got the following error : Also, I tried to start Zope after that and obtain the other following message. What can I do? Bye, FR. Install error ========= [root@srnoix Zope2]# ./install Built-in exception class not found: EnvironmentError. Library mismatch? Warning! Falling back to string-based exceptions ------------------------------------------------------------------------------ Compiling python modules ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ creating default access file Note: The super user name and password are 'superuser' and 'UWHI16bP'. You can change the superuser name and password with the zpasswd script. To find out more, type: /opt/digicool/zope/Zope2/bin/python zpasswd.py chmod 0600 /opt/digicool/zope/Zope2/access chmod 0711 /opt/digicool/zope/Zope2/var ------------------------------------------------------------------------------ creating default database chmod 0600 /opt/digicool/zope/Zope2/var/Data.fs ------------------------------------------------------------------------------ Writing the pcgi resource file (ie cgi script), /opt/digicool/zope/Zope2/Zope.cgi chmod 0711 /opt/digicool/zope/Zope2/Zope.cgi ------------------------------------------------------------------------------ Creating start script, start chmod 0711 /opt/digicool/zope/Zope2/start ------------------------------------------------------------------------------ Creating stop script, stop chmod 0711 /opt/digicool/zope/Zope2/stop ------------------------------------------------------------------------------ Error at startup =========== [root@srnoix Zope2]# ./start Built-in exception class not found: EnvironmentError. Library mismatch? Warning! Falling back to string-based exceptions Traceback (innermost last): File "/opt/digicool/zope/Zope2/z2.py", line 366, in ? import ZServer File "/opt/digicool/zope/Zope2/ZServer/__init__.py", line 123, in ? from HTTPServer import zhttp_server, zhttp_handler File "/opt/digicool/zope/Zope2/ZServer/HTTPServer.py", line 115, in ? from PubCore import handle File "/opt/digicool/zope/Zope2/ZServer/PubCore/__init__.py", line 86, in ? import ZRendezvous File "/opt/digicool/zope/Zope2/ZServer/PubCore/ZRendezvous.py", line 87, in ? from ZServerPublisher import ZServerPublisher File "/opt/digicool/zope/Zope2/ZServer/PubCore/ZServerPublisher.py", line 85, in ? from ZPublisher import publish_module File "/opt/digicool/zope/Zope2/lib/python/ZPublisher/__init__.py", line 87, in ? from Publish import publish_module, Retry File "/opt/digicool/zope/Zope2/lib/python/ZPublisher/Publish.py", line 97, in ? class Retry(Exception): TypeError: base is not a class object