Hi friends, I installed a Oracle 10g and I am facing problem to start listener service. C:\Users\ericarmo>lsnrctl start LSNRCTL for 64-bit Windows: Version 10.2.0.4.0 - Production on 24-FEB-2012 22:35:50 Copyright (c) 1991, 2007, Oracle. All rights reserved. Starting tnslsnr: please wait... Failed to start service, error 0. TNS-12560: TNS:protocol adapter error The content of listener.ora file is: LISTENER = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521)) ) I used to create a new listener.ora and the error persist. I am running this bd on windows environment. When starting via windows services tool it also give error. Any suggestion? Regards Eriovaldo -- //www.freelists.org/webpage/oracle-l