Réparer l'erreur ORA-24248: .... XML DB not installed

$ cd $ORACLE_HOME/rdbms/admin

$ sqlplus / as sysdba

Connected to:

Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production

With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> spool install_xml_db.log

SQL> @catqm xdb sysaux temp YES