Oracle10g重建EM 报ORA

10g重建EM 报ORA-20001: SYSMAN already exists

报错日志如下：

Check if repos user already exists.

原值 6: WHERE username=UPPER('&EM_REPOS_USER');
新值 6: WHERE username=UPPER('SYSMAN');
原值 8: IF ( '&EM_CHECK_TYPE' = 'EXISTS') THEN
新值 8: IF ( 'NOT_EXISTS' = 'EXISTS') THEN
原值 11: raise_application_error(-20000, '&EM_REPOS_USER does not exists..');
新值 11: raise_application_error(-20000, 'SYSMAN does not exists..');
原值 14: ELSIF ( '&EM_CHECK_TYPE' = 'NOT_EXISTS' ) THEN
新值 14: ELSIF ( 'NOT_EXISTS' = 'NOT_EXISTS' ) THEN
原值 17: raise_application_error(-20001, '&EM_REPOS_USER already exists..');
新值 17: raise_application_error(-20001, 'SYSMAN already exists..');
原值 21: raise_application_error(-20002, 'Invalid Check type &EM_CHECK_TYPE');
新值 21: raise_application_error(-20002, 'Invalid Check type NOT_EXISTS');
DECLARE
*
第 1 行出现错误:
ORA-20001: SYSMAN already exists..
ORA-06512: 在 line 17

解决方法：
Logon SQLPLUS as user SYS or SYSTEM, and drop the sysman account and management objects:

SQL> drop user sysman cascade;

SQL> drop role MGMT_USER;

SQL> drop user MGMT_VIEW cascade;

SQL> drop public synonym MGMT_TARGET_BLACKOUTS;

SQL> drop public synonym SETEMVIEWUSERCONTEXT;