OS는 RED HAT ENTERPRISE LINUX

ORACLE 버젼은 9i 입니다.

백업을 받으려고 했는데

>exp userid=system/system full=y file=/oradata/DB_BACKUP/SCM_20050802.dmp

About to export the entire database ...
. exporting tablespace definitions
. exporting profiles
. exporting user definitions
. exporting roles
. exporting resource costs
. exporting rollback segment definitions
. exporting database links
. exporting sequence numbers
. exporting directory aliases
. exporting context namespaces
. exporting foreign function library names
. exporting PUBLIC type synonyms
. exporting private type synonyms
. exporting object type definitions
. exporting system procedural objects and actions
. exporting pre-schema procedural objects and actions
. exporting cluster definitions
EXP-00056: ORACLE error 4068 encountered
ORA-04068: existing state of packages has been discarded
ORA-04067: not executed, package body "SYS.DBMS_METADATA" does not exist
ORA-06508: PL/SQL: could not find program unit being called
ORA-06512: at line 1
EXP-00056: ORACLE error 4068 encountered
ORA-04068: existing state of packages has been discarded
ORA-04067: not executed, package body "SYS.DBMS_METADATA" does not exist
ORA-06508: PL/SQL: could not find program unit being called
ORA-06512: at line 1
EXP-00000: Export terminated unsuccessfully

이런 err가 나고 백업이 안 됩니다....

고수님들의 조언 부탁드립니다.