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  1. #1
    Join Date
    May 2009

    Exclamation Unanswered: TNS-12541: TNS:no listener

    I have installed oracle 9i and forms6i on the same machine, when i try to connect to oracle database using forms 6i i get this error ORA-12203: TNS:unable to connect to destination. When i try to issue tnsping80 i get this error TNS-12538: TNS:no such protocol adapter.

    The listener of the database is running ok, i can shut it down and start it up without any problems. I have tried changing hostname in tnsname.ora by putting an ip address but still iam getting the same error. Firewall i have even turned it off.

  2. #2
    Join Date
    Aug 2003
    Where the Surf Meets the Turf @Del Mar, CA
    Provided Answers: 1
    >I have installed oracle 9i and forms6i on the same machine,
    WHY? Both are obsoleted.

    What is Operating System name & version?

    12541, 00000, "TNS:no listener"
    // *Cause: The connection request could not be completed because the listener
    // is not running.
    // *Action: Ensure that the supplied destination address matches one of
    // the addresses used by the listener - compare the TNSNAMES.ORA entry with
    // the appropriate LISTENER.ORA file (or TNSNAV.ORA if the connection is to
    // go by way of an Interchange). Start the listener on the remote machine.
    12538, 00000, "TNS:no such protocol adapter"
    // *Cause: The protocol adapter requested (by way of the "(PROTOCOL=..)"
    // keyword-value pair in a TNS address) is unknown. If the supplied address
    // is typographically correct then the protocol adapter is not installed.
    // *Action: Install the protocol adapter or correct typographically error,
    // as appropriate.  Note: if the supplied address was derived from
    // resolving the service name, check the address in the appropriate file
    I suspect you have multiple $ORACLE_HOME folders & more than 1 tnsnames.ora files and are using an invalid copy.
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