Hi
I am getting an error when I tried this---->
SQL> desc dba_users;
ERROR:
ORA-04043: object dba_users does not exist


SQL> select username from dba_users;
select username from dba_users
*
ERROR at line 1:
ORA-00942: table or view does not exist

It used to work fine before. Any help would be appreciated to resolve this.

Thanks in advance.