Trying to drop the table

Hello Friends,
Im trying to drop/truncate some user  tables in database(10.2.0.2.0).
But im getting error like

ERROR at line 1:
ORA-00942: table or view does not exist

Please give some suggestions on this.


SQL> TRUNCATE TABLE E3SSTG.SYMBOLATTRIBUTE;
TRUNCATE TABLE E3SSTG.SYMBOLATTRIBUTE
                      *
ERROR at line 1:
ORA-00942: table or view does not exist

SQL> DROP TABLE E3SSTG.SymbolAttribute;
DROP TABLE E3SSTG.SymbolAttribute
                  *
ERROR at line 1:
ORA-00942: table or view does not exist