Hi all
While explaining i am getting this error please help.

SQL> set autotrace on
SP2-0618: Cannot find the Session Identifier. Check PLUSTRACE role is enabled
SP2-0611: Error enabling STATISTICS report

and

SQL> set autotrace traceonly explain
SQL> select * from cat;

Execution Plan
----------------------------------------------------------
ERROR:
ORA-01039: insufficient privileges on underlying objects of the view


SP2-0612: Error generating AUTOTRACE EXPLAIN report
SQL>