Hi, We are using 10g on windows and whenever I changes system clock to past, oracle doesn't startup. And I get errors: SQL> connect sys/[Email address protected] as sysdba ERROR: ORA-12514: TNS:listener does not currently know of service requested in connect descriptor SQL> connect / as sysdba ERROR: ORA-01041: internal error. hostdef extension doesn't exist More error like this when try to connect to already running oracle after time changes: R:\>sqlplus hs/hs SQL*Plus: Release 10.1.0.2.0 - Production on Wed Feb 18 16:06:39 2004 Copyright (c) 1982, 2004, Oracle. All rights reserved. ERROR: ORA-28547: connection to server failed, probable Net8 admin error But if I change clock back to current time it start working again. What is the workaround to be able to change date to the past date and still use oracle. Thanks --Harvinder ---------------------------------------------------------------- Please see the official ORACLE-L FAQ: http://www.orafaq.com ---------------------------------------------------------------- To unsubscribe send email to: oracle-l-request@xxxxxxxxxxxxx put 'unsubscribe' in the subject line. -- Archives are at //www.freelists.org/archives/oracle-l/ FAQ is at //www.freelists.org/help/fom-serve/cache/1.html -----------------------------------------------------------------