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ORA-12560: TNS:protocol adapter error on windows machine while starting oracleORA-12560: TNS:protocol adapter error on windows machine while starting oracle Error Description On my windows server machine whenever I try to logon to database as a sysdba user it fails with the message ORA-12560.
C:\Documents and Settings\Oracle> sqlplus / as sysdba
SQL*Plus: Release 10.2.0.1.0 - Production on Sat Aug 16 11:01:58 2008
Copyright (c) 1982, 2005, Oracle. All rights reserved.
ERROR:
ORA-12560: TNS:protocol adapter error Comments
First off check the listener is running or not
IF you are directly connected to database server then Try to logon with sys i.e. sql>conn sys/password as sysdba IF it works then check the sqlnet.ora file. and use appropriate authentication method. -- Suresh Borse
By: Suresh Borse | 02 Dec 2008
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