Red Hat Enterprise Linux 6.3 registration is failing with "ImportError: /usr/lib64/python2.6/site-packages/_xmlplus/parsers/pyexpat.so: symbol XML_SetHashSalt, version EXPAT_2_0_1_RH not defined in file libexpat.so.1 with link time reference"

Issue

Unable to register system when trying to execute rhn_register


Environment

Red Hat Enterprise Linux 6.3
python-2.6.6-29.el6_2.2.x86_64.rpm
python-libs-2.6.6-29.el6_2.2.x86_64.rpm


Resolution

Update the python and python-libs packages to the latest version.
Download python-libs-2.6.6-36.el6.x86_64.rpm and python-2.6.6-36.el6.x86_64.rpm on the client system (from RHN/Satellite) and then execute the below mentioned command to install these packages on your system:

# yum install python-libs-2.6.6-36.el6.x86_64.rpm python-2.6.6-36.el6.x86_64.rpm