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Thread: ORA-12541: TNS:no listener

  1. #1

    ORA-12541: TNS:no listener

    Hi friends,

    When I am trying to connect oracle database from Toad, I am getting the following error.

    ORA-12541: TNS:no listener
    SID_NAME = DB01
    oracle version =
    OS = windows xp sp2

    I would appreciate if anybody can help me to resolve this issue.
    Thanks in advance..

    - venky

    Question asked by visitor venka

  2. #2
    Expert Member
    Join Date
    Sep 2006

    Re: ORA-12541: TNS:no listener


    Probably the listener was not running.
    Start the listener using "lsnrctl start" command in Unix and if its Windows OS start the listener service.
    If the listener is running & still u have problems, check the Host name & port in the listener.ora file.

    *** Innila ***

  3. #3
    Join Date
    Jun 2007

    Re: ORA-12541: TNS:no listener

    kindly check if the oracle 9i TNSlistener is running or not .

  4. #4
    Junior Member
    Join Date
    Apr 2007

    Re: ORA-12541: TNS:no listener

    first check that in sqlplus,it is workin or not.
    if yes then

    r u sure that it is correct databse name ,for toad .

  5. #5
    Junior Member
    Join Date
    May 2007

    Re: ORA-12541: TNS:no listener

    The Oracle server is down

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