ORA-12571:	TNS:packet writer failure
Cause:	An error occurred during a data send.
Action:	Not normally visible to the user. For further details,
 turn on tracing and reexecute the operation. If error persists, 
contact Oracle Customer Support.

1  select sa.sql_text,ss.username,ss.osuser,to_char(ss.logon_time,'dd-mon-yy hh:mi:ss'),sq.sql_text,sq.FIRST_LOAD_TIME   from v$s
ession ss, v$sqlarea sa,v$sql sq where sa.hash_value=ss.prev_hash_value and sa.hash_value=sq.hash_value and
  2* ss.sid=156
SQL> /
 
SQL_TEXT                       USERNAME                       OSUSER
------------------------------ ------------------------------ ------------------------------
TO_CHAR(SS.LOGON_T SQL_TEXT                       FIRST_LOAD_TIME
------------------ ------------------------------ -------------------
ROLLBACK TO FM_1               SAMIINVENTORY                  hashim
05-nov-07 10:09:27 ROLLBACK TO FM_1               2007-07-09/08:24:54
 
1 row selected.