我正在使用一个命令：
$ exp userid=apex_public_user/apex_public_user OWNER=apex_public_user DIRECT=Y CONSISTENT=Y FILE=/home/oracle/apex_public_user.dmp
并获得以下输出：
Export: Release 10.2.0.1.0 - Production on Fr May 18 11:55:20 2012
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to: Oracle Database 10g Express Edition Release 10.2.0.1.0 - Production
Export done in AL32UTF8 character set and AL16UTF16 NCHAR character set
. exporting pre-schema procedural objects and actions
EXP-00008: ORACLE error 4063 encountered
ORA-04063: package body "SYS.DBMS_REPCAT_UTL" has errors
ORA-06508: PL/SQL: could not find program unit being called: "SYS.DBMS_REPCAT_UTL"
ORA-06512: at …