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by Anonymous on February 1st, 2005

Anonymous

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Help answer this question below.

Whenever I try to log on to Oracle9i SQL *Plus, I get an error message:
ORA-12560: TNS:protocol adapter error. What's wrong ad how can I fix it?

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Answers. 1 helpful answer below.

  • by sandman35 on May 22nd, 2006

    sandman35

    This is a generic error and as such there could be many reasons for this. It requires troubleshooting. The first thing to look at are your (IP) addressed, check that they are properly specified in your listener.ora and that the listener is running correctly, then check your tnsnames.ora. Use tnsping to test. Ping your hosts. Try a traceroute to your host. Or finally you can turn on oracle net tracing to find your problem.

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