I have several machine running CentOS I upgraded all of them from 5.3 to 5.4 One machine has a yum problem after upgrading # yum update Loaded plugins: fastestmirror Determining fastest mirrors * addons: mirror.trouble-free.net * base: mirror.team-cymru.org * extras: mirror.team-cymru.org * updates: mirror.raystedman.net addons | 951 B 00:00 addons/primary | 201 B 00:00 Traceback (most recent call last): File "/usr/bin/yum", line 29, in ? yummain.user_main(sys.argv[1:], exit_code=True) File "/usr/share/yum-cli/yummain.py", line 309, in user_main errcode = main(args) File "/usr/share/yum-cli/yummain.py", line 178, in main result, resultmsgs = base.doCommands() File "/usr/share/yum-cli/cli.py", line 345, in doCommands self._getTs(needTsRemove) File "/usr/lib/python2.4/site-packages/yum/depsolve.py", line 101, in _getTs self._getTsInfo(remove_only) File "/usr/lib/python2.4/site-packages/yum/depsolve.py", line 112, in _getTsInfo pkgSack = self.pkgSack File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 661, in <lambda> pkgSack = property(fget=lambda self: self._getSacks(), File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 501, in _getSacks self.repos.populateSack(which=repos) File "/usr/lib/python2.4/site-packages/yum/repos.py", line 260, in populateSack sack.populate(repo, mdtype, callback, cacheonly) File "/usr/lib/python2.4/site-packages/yum/yumRepo.py", line 190, in populate dobj = repo_cache_function(xml, csum) File "/usr/lib/python2.4/site-packages/sqlitecachec.py", line 42, in getPrimary self.repoid)) TypeError: Parsing primary.xml error: Start tag expected, '<' not found I have tried 'yum clean all', 'yum --noplugins', 'rm -r /var/cache/yum/*', deleting all yum packages and reinstalling, and nothing helps If I copy /var/cache/yum/* from a working machine all is well I have used md5sum to check the downloaded files and they match the files on a working machine If I disable the addons repo the other repos load ok Also rpmforge repo breaks yum What else might I try Thanks Richard