Oracle, error while exporting schema
Your database is unhappy.

Login to your Linux box as the DB owner user (usually oracle), restart it &amp; then do the following to recreate the broken data dictionary objects:

sqlplus / as sysdba

@?/rdbms/admin/catrepr.sql

@?/rdbms/admin/catrep.sql 

@?/rdbms/admin/utlrp.sql


Restart the database once done.

This is an unusual situation to be in - Has the DB been recently upgraded?