Hi, The following exception occurred. The system was upgraded from RedHat 9 Legacy (updated regularly using Fedora Legacy project) to CentOS 4.1 (Linux 2.6.9-11). When I installed yum and yum-conf, I had a problem of yum not getting $releasever. Thus I hand edited /etc/yum.repos.d/CentOS-Base.repo $releasever to 4. I did the full update using yum. Now up2date gets the following exception. I don't understand why it is looking for CNS-CA-CERT. Exception type exceptions.ValueError Exception Handler Information Traceback (most recent call last): File "/usr/share/rhn/rhn_applet/rhn_applet.py", line 586, in refresh self.model.refresh(force) File "/usr/share/rhn/rhn_applet/rhn_applet_model.py", line 447, in refresh source.refresh(force) File "/usr/share/rhn/rhn_applet/rhn_applet_source.py", line 35, in refresh self._do_refresh() File "/usr/share/rhn/rhn_applet/rhn_applet_rpc.py", line 190, in _do_refresh server = self.create_server() File "/usr/share/rhn/rhn_applet/rhn_applet_rpc.py", line 83, in create_server s.add_trusted_cert(self.__cert__) File "/usr/lib/python2.3/site-packages/rhn/rpclib.py", line 440, in add_trusted_cert self._transport.add_trusted_cert(certfile) File "/usr/lib/python2.3/site-packages/rhn/transports.py", line 253, in add_trusted_cert raise ValueError, "Certificate file %s is not accessible" % certfile ValueError: Certificate file /usr/share/rhn/CNS-CA-CERT is not accessible