TNS-12545

C:\>lsnrctl status

LSNRCTL for 32-bit Windows: Version 10.1.0.2.0 - Production on 07-MAR-2007 10:33
:20

Copyright (c) 1991, 2004, Oracle. All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=alwarid-0a49914.fakhrudd
in.local)(PORT=1521)))
TNS-12545: Connect failed because target host or object does not exist
TNS-12560: TNS:protocol adapter error
TNS-00515: Connect failed because target host or object does not exist
32-bit Windows Error: 1004: Unknown error

Clause :
1.My computer name is taj not Oa49914.
C:\>hostname
taj

Suggestion :
1.Always use IP ADDRESS instead of COMPUTER NAME.
2.Change computer name Oa49914 to taj.

C:\>lsnrctl status

LSNRCTL for 32-bit Windows: Version 10.1.0.2.0 - Production on 07-MAR-2007 10:38
:27

Copyright (c) 1991, 2004, Oracle. All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.100.64)(PORT=152
1)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for 32-bit Windows: Version 10.1.0.2.0 - Produ
ction
Start Date 07-MAR-2007 10:38:19
Uptime 0 days 0 hr. 0 min. 10 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File C:\oracle\product\10.1.0\Db_1\network\admin\listener.o
ra
Listener Log File C:\oracle\product\10.1.0\Db_1\network\log\listener.log

Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.100.64)(PORT=1521)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully

C:\>

SQL> conn scott/tiger@orcl
Connected.