Connection to Oracle from remote computer in local network

Question

I have local network with two computers: WinXP with Oracle 10g and Vista with Oracle Client tools. I need to connect to the Oracle 10g from the client PC with sqlplus and with Enterprise Manager Console. Sqlplus returns ORA-12154 error, EM console returns ORA-12541 error.
Is the problem in configuration of listener.ora, tnsnames.ora and sqlnet.ora on the server side and on the client side? They look like this:
Server side:
# tnsnames.ora Network Configuration File: C:\oracle\product\10.2.0\db_1\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.
ORCL =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.0.0.9)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.0.0.9)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = orcl)
# sqlnet.ora
SQLNET.AUTHENTICATION_SERVICES= (NTS)
NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)
# listener.ora Network Configuration File:
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = C:\oracle\product\10.2.0\db_1)
(PROGRAM = extproc)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.0.0.9)(PORT = 1521))
Client side:
# tnsnames.ora Network Configuration File:
ORCL =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.0.0.9)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = orcl)
# sqlnet.ora Network Configuration File: C:\oracle\product\10.2.0
SQLNET.AUTHENTICATION_SERVICES= (NTS, EZCONNECT)
NAMES.DIRECTORY_PATH= (TNSNAMES)
Are these files configured fine? Or do I have to configure also something else? When I do tnsping 10.0.0.9 from the client, the result is OK. So what is wrong? Thanks a lot for help, Petr.

Answer 1

Sqlplus returns ORA-12154 error, EM console returns ORA-12541 error- Make sure that "TNSNAMES" is listed as one of the values of the NAMES.DIRECTORY_PATH parameter in the Oracle Net profile (SQLNET.ORA)
- Verify that a TNSNAMES.ORA file exists and is in the proper directory and is accessible.
- Check that the net service name used as the connect identifier exists in the TNSNAMES.ORA file.
- Make sure there are no syntax errors anywhere in the TNSNAMES.ORA file. Look for unmatched parentheses or stray characters. Errors in a TNSNAMES.ORA file may make it unusable.
HTH