Hi Greg, Thanks for all the suggestions. To add to it, it seems to be a problem with Up2Date too. Which I have also rebuilt. The error messages from Up2Date were more extgensive, but after checking, everything seems to be in perfect order, so it comes down to somethign about Python. As I said, I isntalled from source then removed then re-installed from Fedora RPM's. This is driving me nuts! As you can imagine having neither Yum or Up2Date puts me in a heck of a bind. Here are the errors from Up2Date: up2date Traceback (most recent call last): File "/usr/sbin/up2date", line 33, in ? from up2date_client import up2date File "/usr/share/rhn/up2date_client/up2date.py", line 32, in ? import depSolver File "/usr/share/rhn/up2date_client/depSolver.py", line 11, in ? import packageList File "/usr/share/rhn/up2date_client/packageList.py", line 20, in ? import up2dateComps File "/usr/share/rhn/up2date_client/up2dateComps.py", line 9, in ? from rhpl import comps File "/usr/lib/python2.4/site-packages/rhpl/comps.py", line 5, in ? import libxml2 File "/usr/lib/python2.4/site-packages/libxml2.py", line 1, in ? import libxml2mod ImportError: /usr/lib/python2.4/site-packages/libxml2mod.so: undefined symbol: xmlXIncludeProcessFlags ----- Original Message ----- From: "Greg Knaddison" <greg.knaddison@xxxxxxxxx> To: "Richard" <Richard@xxxxxxxxx> Cc: <Yum@xxxxxxxxxxxxxxxxxxxx>; <yum@xxxxxxxxxxxxxxxxxxxx> Sent: Monday, November 28, 2005 2:08 PM Subject: Re: Yum - Undefined Symbol Richard, Maybe you can uninstall yum, download the yum src rpm from http://linux.duke.edu/projects/yum/download/2.4/yum-2.4.0-1.src.rpm and then run rpmbuild --rebuild yum*.src.rpm in the directory where you downloaded that file and then run rpm -iv on the resultant rpm file and see if that works. Regards, Greg