EXP-00008, ORA-04063, ORA-06508, EXP-00083 PL/SQL: could not find program unit

Problem Description
Oracle full database export fails with error stack EXP-00008, ORA-04063, ORA-06508, EXP-00083 like below.
EXP-00008: ORACLE error 4063 encountered
ORA-04063: package body "WMSYS.LT_EXPORT_PKG" has errors
ORA-06508: PL/SQL: could not find program unit being called: "WMSYS.LT_EXPORT_PKG"
ORA-06512: at line 1
EXP-00083: The previous problem occurred when calling WMSYS.LT_EXPORT_PKG.schema_info_exp

Cause of the Problem
The above problems are caused by the revoke of the execute privilege on UTL_FILE package from Public.

Oracle Workspace Manager (OWM) and some other database components (which are not installed in the database) need the privilege to execute procedure SYS.UTL_FILE.

During the creation of a default Database, the Workspace Manager gets installed by default. and the WMSYS user becomes intertwined with the export process and must be valid or at least the major parts for an export to complete properly as the export process looks for any "version-enabled" tables that Workspace Manager schema may be using.

Solution of the Problem
In order to solve above problems do following steps.

1. Grant execute privilege on SYS.UTL_FILE package to WMSYS user.
SQL> grant execute on SYS.UTL_FILE to WMSYS;

2. check for invalid objects in the WMSYS schema using following query,
SQL> select object_name,object_type,owner,status from dba_objects where status='INVALID' and owner='WMSYS';

3. Run script $ORACLE_HOME/rdbms/admin/utlrp.sql
SQL> @$ORACLE_HOME/rdbms/admin/utlrp.sql

Related Documents
http://arjudba.blogspot.com/2010/02/exp-00008-ora-06550-pls-00201-exp-00083.html
http://arjudba.blogspot.com/2010/02/ora-39127-ora-04063-ora-06508-ora-06512.html
http://arjudba.blogspot.com/2010/02/exp-00008-ora-04063-ora-06508-exp-00083.html
http://arjudba.blogspot.com/2009/12/export-fully-fails-with-pls-00201-ora.html
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http://arjudba.blogspot.com/2008/07/data-pump-export-fails-with-ora-39000.html
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http://arjudba.blogspot.com/2009/05/ora-39000-ora-39143-dump-file-may-be.html
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