hjr_at_dizwell.com (Howard J. Rogers) wrote in message news:<14a1f766.0402251539.25024b1_at_posting.google.com>...
> idogan_tech_at_yahoo.com (Ibrahim DOGAN) wrote in message news:<6bf58828.0402251154.bfd587b_at_posting.google.com>...
> > I'm trying to connect to a remote Oracle database from a Unix box.
> >
> > Unix : AIX 4.3.3.
> > Oracle: 8.1.7
> >
> > $> sqlplus sys/syspassword_at_my_db_name
> > Connected.
> >
> > perfectly works
> >
> > but, the following commands generate ORA-12545: error, any idea why ? :
> >
> > $> export ORACLE_SID=my_db_name
> > $> sqlplus "/ as sysdba"
> > ERROR:
> > ORA-12545: Connect failed because target host or object does not exist
> >
> > i.d.
>
>
> Because when you are connecting from a remote machine, you have to do
> so via the Listener, which means use a tnsnames alias (or its
> centralised names resolution equivalent) which is what your first
> example does. When you fail to suppl an alias, Oracle expects to find
> an instance named the same as your ORACLE_SID *running on that
> machine*, not on a remote one.
>
> Your second example's error message, when roughly translated into
> ordinary English, actually reads "'Ere mate: there's no instance
> called "my_db_name" running on your PC".
>
> Regards
> HJR
FYI, the error msg is actualy documented under TNS-12545. You can get
the same error if your DNS configuration is not correct, or the
tnsnames.ora file is missing, or missing the entry for your instance.
Received on Thu Feb 26 2004 - 09:29:45 CST
