You might have install the 8.1 client.  I may be wrong but I think with the
8.1 client you can connect to 8.1 and any version lower but with the 8.0
client you cannot connect to a higher version.  If you don't have the 8.1
client CD you can download the client at Oracle's site.

Dave

-----Original Message-----
Sent: Thursday, November 15, 2001 5:25 AM
To: Multiple recipients of list ORACLE-L



Forgive me if this is a RTFM question - I have not been able to find the
right bit of the FM.

Can someone please tell me how to Net8 connect an 8.0 NT client to an 8.1
Linux server.

Everything was working fine until a second Oracle instance was installed on
the server.  I now get 

ERROR:
ORA-12545: Connect failed because target host or object does not exist


My tnsnames.ora looks like this...

ORANGE.WORLD =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 123.456.798.101)(PORT = 1521))
    (CONNECT_DATA = (SID = ORANGE))
  )

The server listener.ora looks like this

# LISTENER.ORA Network Configuration File:
/opt/oracle/product/8.1.7/network/admin/listener.ora
# Generated by Oracle configuration tools.

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS_LIST =
        (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
      )
      (ADDRESS_LIST =
        (ADDRESS = (PROTOCOL = TCP)(HOST = abc123defghi)(PORT = 1521))
      )
    )
    (DESCRIPTION =
      (PROTOCOL_STACK =
        (PRESENTATION = GIOP)
        (SESSION = RAW)
      )
      (ADDRESS = (PROTOCOL = TCP)(HOST = abc123defghi)(PORT = 2481))
    )
  )

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = /opt/oracle/product/8.1.7)
      (PROGRAM = extproc)
    )
    (SID_DESC =
      (GLOBAL_DBNAME = TEST.abc123de)
      (ORACLE_HOME = /opt/oracle/product/8.1.7)
      (SID_NAME = TEST)
    )
    (SID_DESC =
      (GLOBAL_DBNAME = ORANGE.acn032hq)
      (ORACLE_HOME = /opt/oracle/product/8.1.7)
      (SID_NAME = ORANGE)
    )
  )

I anonymised the data (obviously)

Many thanks to anyone who understands this stuff.

David Jones
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