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ORA-12545: TNS: name lookup failure (Oracle 8.1.6)

Connecting to an Oracle 8.1.6 database on HP-UX server.
I am able to tnsping the ORACLE_SID from the NT server MS-DOS command prompt. However, when I try to connect using e.g. SQL*Plus 3.3 I get the following error and cannot proceed:

ORA-12545: TNS: name lookup failure

The entry in the c:\orant\network\admin\tnsnames.ora file looks fine.

Can anyone help?

Thanks
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forquestion

Check your SQLNet.ora, If there are lines like :

NAMES.DEFAULT_DOMAIN = yourdomain
SQLNET.AUTHENTICATION_SERVICES= (NTS)

Then it needs to lookup dns server


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ASKER

Thank you for your comment. This is a fresh 8.1.6 installation. The SQLNet.ora file is not being used.
How about the listener.ora. Can you show both listner.ora in HP and tnsnames.ora in NT to here? If there is any SQLNET.ora in NT, please post to here too.



Depending on the version of SQLPLUS and the tools, some use NET8, some use SQLNET, to talk to the the DB. The NET8 is newer. NET8 looks in c:\orant\net80\admin; while sqlnet looks in c:\orant\network\admin. Check that the same TNSNAMES.ORA file is in BOTH directories, with the desired alias.

Do you have a registry setting for TNS_ADMIN? If so, that directory is where it will look for a TNSNAME.ORA file.

The other thing I just found out had to do with multiple Oracle Homes. Are you using multiple Oracle Homes?
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ASKER

tnsnames.ora amended in both Net8 & SQLNet admin folders:

Beq-local.world =
  (DESCRIPTION =
    (ADDRESS_LIST =
        (ADDRESS =
          (COMMUNITY = beq.world)
          (PROTOCOL = BEQ)
          (PROGRAM = oracle73)
          (ARGV0 = oracle73ORCL)
          (ARGS = '(DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))')
        )
    )
    (CONNECT_DATA = (SID = ORCL)
    )
  )
CDEV.world =
  (DESCRIPTION =
    (ADDRESS_LIST =
        (ADDRESS =
          (COMMUNITY = tcp.world)
          (PROTOCOL = TCP)
          (Host = 20.44.147.100)
          (Port = 1521)
        )
    )
    (CONNECT_DATA = (SID = CDEV)
    )
  )

listener ora file on HP-UX server:

LISTENER =
 (ADDRESS_LIST=3%)
   (ADDRESS=(PROTOCOL=tcp)
            (HOST=localhost)
            (PORT=1521)
   )
  )

SID_LIST_LISTENER=
   (SID_LIST=
      (SID_DESC=
          (GLOBAL_DBNAME=CDEV.world)
          (SID_NAME=CDEV)
          (ORACLE_HOME=/u01/app/oracle/product/8.1.6)
         (PRESPAWN_MAX=20)
          (PRESPAWN_LIST=
           (PRESPAWN_DESC=(PROTOCOL=tcp)(POOL_SIZE=2)(TIMEOUT=1))
         )
        )
       )

It looks like both tnsnames.ora and listener.ora are copied from Oracle7 or Oracle8. Some parameter are obsoluted.

Please check the localhost IP. Usually localhost is using 127.0.0.1.


  Check your localhost address: host localhost or get it from /etc/hosts.
  change localhost to IP address(not 127.0.0.1).
  I suggest you reconfig listener.ora and tnsnames.ora.
On server:run netassist to config listener.ora.on client
select net8 assist menu to config tnsnames.ora.if client is sql*net,select net easy config menu
 
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