Get an error when grant execute on dbms_lock to user?

Question

Hi all,
i have to grant several privileges/roles to user X, it works fine if only one privilege/role is granted one time, but an error raised when i put them together in one grant command, does anyone have any ideas regarding this? thanks in advance.
sqlplus sys/*****@*** as sysdba
SQL> grant execute on dbms_lock to X;
Grant succeeded.
SQL> grant resource to X;
Grant succeeded.
SQL> grant execute on dbms_lock,resource to X;
grant execute on dbms_lock,resource to X
ERROR at line 1:
ORA-00905: missing keyword
SQL> grant resource,execute on dbms_lock to X;
grant resource,execute on dbms_lock to X
ERROR at line 1:
ORA-01953: command no longer valid, see ALTER USER

Answer 1

>
SQL> grant execute on dbms_lock,resource to X;
grant execute on dbms_lock,resource to X
ERROR at line 1:
ORA-00905: missing keyword
SQL> grant resource,execute on dbms_lock to X;
grant resource,execute on dbms_lock to X
ERROR at line 1:
ORA-01953: command no longer valid, see ALTER USER
>
It will help to read the documentation on grant statement.
You can't grant privileges on two different objects or roles in one statement. However you can grant two or more privileges on same object in one statement.
SQL> grant select,update on emp to X;