when I run "yum" with no arguments I get this error message: There was a problem importing one of the Python modules required to run yum. The error leading to this problem was: /usr/lib/python2.4/site-packages/cElementTree.so: wrong ELF class: ELFCLASS32 I can't find any python-elementtree for x86_64. I've tried installing python-elementtree-1.2.6-4.2.1.src.rpm , as well as the i586 version, to no avail. The above error was produced when I had the i586 version installed Here is the what happens when installing the src rpm: penguin12:/tmp/python_elementtree # rpm -ivh * warning: python-elementtree-1.2.6-4.2.1.src.rpm: Header V3 DSA signature: NOKEY, key ID 4f2a6fd2 1:python-elementtree ########################################### [100%] penguin12:/tmp/python_elementtree # ls -ltar total 164 -rw-r--r-- 1 root root 160896 Apr 12 12:13 python-elementtree-1.2.6-4.2.1.src.rpm drwxr-xr-x 2 root root 51 Apr 12 12:15 . drwxrwxrwt 8 root root 4096 Apr 12 13:08 .. penguin12:/tmp/python_elementtree # rpm -q -p python-elementtree-1.2.6-4.2.1.src.rpm --dump warning: python-elementtree-1.2.6-4.2.1.src.rpm: Header V3 DSA signature: NOKEY, key ID 4f2a6fd2 cElementTree-1.0.2-20050302.zip 100135 1112627269 aba87db5932ac46fd7a75cfbc711f6ba 0100664 root root 0 0 0 X cElementTree-system-expat-setup.py 1623 1112627271 94c820d2c675036390f89e9fb00ef323 0100664 root root 0 0 0 X elementtree-1.2.6-20050316.zip 60939 1112627269 6751a9005efbd2c543ef32905d4a0acd 0100664 root root 0 0 0 X python-elementtree.spec 3177 1139635405 8e021600b30c18b9bdcec9ee2503aad3 0100664 root root 0 0 0 X Then I run yum: penguin12:/tmp/python_elementtree # yum There was a problem importing one of the Python modules required to run yum. The error leading to this problem was: No module named cElementTree Please install a package which provides this module, or verify that the module is installed correctly.