Explain plan issue

Question

Oracle 11.2.0.1
Windows
SQL> show user;
USER is "SCOTT"
SQL> set autotrace on;
ERROR:
ORA-06575: Package or function DBMS_XPLAN is in an invalid state
SP2-0611: Error enabling EXPLAIN report
SQL> connect hr/hr
Connected.
SQL> set autotrace on;
SQL>
Why Scott user is getting above error and how do I correct this please help me.
Thanks.

Answer 1

Thank you so much sir. You are 100% correct.
SQL> select object_type,object_name
  2  from user_objects
  3  where object_name like '%PLAN%';
OBJECT_TYPE         OBJECT_NAME
PACKAGE             DBMS_XPLAN
LIBRARY             DBMS_XPLAN_LIB
TABLE               PLAN_TABLE
SQL> drop table plan_table purge;
Table dropped.
SQL> drop package dbms_xplan;
Package dropped.
SQL> select object_type,object_name
  2  from user_objects
  3  where object_name like '%PLAN%';
OBJECT_TYPE         OBJECT_NAME
LIBRARY             DBMS_XPLAN_LIB
SQL> drop library dbms_xplan_lib;
Library dropped.
SQL> set autotrace on;
SQL> explain plan for select * from emp;
Explained.
SQL> SET LINESIZE 130
SQL> SET PAGESIZE 0
SQL> SELECT *
  2  FROM   TABLE(DBMS_XPLAN.DISPLAY);
Plan hash value: 3956160932
and I got the plan.
Thanks again.