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Thread: ORA-12541: TNS:no listener

  1. #1
    Geek_Guest
    Guest

    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 = 9.2.0.1.0
    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
    Answers
    130

    Re: ORA-12541: TNS:no listener

    Hi,

    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
    Moderator
    Join Date
    Jun 2007
    Answers
    2,074

    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
    Answers
    11

    Re: ORA-12541: TNS:no listener

    hi
    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
    Answers
    1

    Re: ORA-12541: TNS:no listener

    The Oracle server is down


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