Install SGML Common by running the following commands: ./configure --prefix=/usr --sysconfdir=/etc --mandir=/usr/share/man && make && make install && install-catalog --add /etc/sgml/sgml-ent.cat \ /usr/share/sgml/sgml-iso-entities-8879.1986/catalog && install-catalog --add /etc/sgml/sgml-docbook.cat \ /etc/sgml/sgml-ent.cat Remove the above catalog items prior to upgrading with: install-catalog --remove /etc/sgml/sgml-ent.cat \ /usr/share/sgml/sgml-iso-entities-8879.1986/catalog && install-catalog --remove /etc/sgml/sgml-docbook.cat \ /etc/sgml/sgml-ent.cat