EXP-00008, ORA-04063, ORA-06508, EXP-00083 PL/SQL: could not find program unit being called: "WMSYS.LTUTIL"

PROBLEM:
The following errors were thrown during export:

. exporting dimensions
. exporting post-schema procedural objects and actions
EXP-00008: ORACLE error 4063 encountered
ORA-04063: package body "WMSYS.LTUTIL" has errors
ORA-06508: PL/SQL: could not find program unit being called: "WMSYS.LTUTIL"
ORA-06512: at "WMSYS.LT_EXPORT_PKG", line 1688
ORA-06512: at line 1
EXP-00083: The previous problem occurred when calling WMSYS.LT_EXPORT_PKG.schema_info_exp
. exporting statistics
Export terminated successfully with warnings.

CAUSES:

1. There are invalid objects in the WORKSPACE, XDB schemas.
2. Absence of execute privilege on UTL_FILE package from PUBLIC.
 
SOLUTION:

CAUSE 1: Connect as SYS and run $ORACLE_HOME/rdbms/admin/owminst.plb to allow the LT_EXPORT_PKG to be validated.

CAUSE 2:

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,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

Run the export again.