Hi all. After I upgraded my Fedora Core 3 to Fedora Core 4, the yum reports the error below: [root@Marcos ~]# yum update The yum libraries do not seem to be available on your system for this version of python 2.4.1 (#1, May 16 2005, 15:19:29) [GCC 4.0.0 20050512 (Red Hat 4.0.0-5)] Please make sure the package you used to install yum was built for your install of python. [root@Marcos ~]# Could someone please help me? Thanks, Marcos