Best Way To Remove Toad Error 12541

Over the past few days, some of our users have reported to us that they have experienced Toad error 12541.

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    ORA-12541 message – “Low Listener TNS”. This happens when the audience crashed when trying to connect, or didn’t start and wasn’t configured correctly. Also, this is most certainly caused by a network connection error.

    World of toad quests

    When you create a new connection in our Add Connection Entry window, it checks out fine, but it doesn’t connect.Connection

    Saving assumes that the hostname, port, and client service information is missing.

    They can be re-entered in the “login window” without any information, after which the entered data will be correctly combined and saved without problems.

    My system is in a domain used by my company. Oracle is installed on a separate system. I can connect to Oracle using SQL Plus, but every time I try to connect to Toad I get a success error.

    How do I fix TNS listener does not currently know of service requested in connect descriptor?

    Wait until now and try to connect in the future.Check which services the listener is currently listening on by running: lsnrctl services.Ensure that the SERVICE_NAME parameter of the network service name connection descriptor used specifies a company known to the listener.

     SID_LIST_LISTENER = (SID_LIST=(SID_DESC=  (SID_NAME = PLSExtProc)  (ORACLE_HOME is C:oralexapporacleproduct11.2.0server)  (PROGRAM =extproc))  (SID_DESC=  (SID_NAME=CLRExtProc)  (ORACLE_HOME=C:oralexapporacleproduct11.2.0server)  (PROGRAM equals extproc))   )   AUDITOR =(DESCRIPTION_LIST =  (DESCRIPTION =  (ADDRESS = (PROTOCOL equals IPC) (KEY = extproc1)) (ADDRESS means (PROTOCOL=TCP)(HOST=ASDi303.abc.com)(PORT is 1521))   ) ) DEFAULT_SERVICE_LISTENER=(XE)

    </p> <section> <div> <div> <div> <div><a aria-label='User: "3788579"'><img onerror="this.src='https://formatnerd.com/wp-content/uploads/2021/11/1pixel.jpg'"> </a> </div> <div> <div> <div> <p>Hello</p> <p><img onerror="this.src='https://formatnerd.com/wp-content/uploads/2021/11/1pixel.jpg'" src="https://i.stack.imgur.com/mJPpk.png" style="margin-top:20px; margin-bottom:20px; display: block; margin: 0 auto;" alt="toad error 12541"></p> <p>Environment:</p> <p>VMware Workstation 12 Pro</p> <p>Virtual Machine Environment: RHEL 7.3 (3.10.0-514.21.1.el7.x86_64)</p> <p>Oracle 12c (12.2.0.1) Oracle 12c (12.2.0.1)</p> <div style="box-shadow: rgba(0, 0, 0, 0.02) 0px 1px 3px 0px, rgba(27, 31, 35, 0.15) 0px 0px 0px 1px;padding:20px 10px 20px 10px;"> <p><h2 id="3">How do I enable TNS listener?</h2> <p>Always connect to the host where the Oracle database resides.Go to the following catalog website: Solaris: Oracle_HOME/bin. Windows: Oracle_HOMEbin.To start the listener service, type keep control on: Solaris: lsnrctl START. Windows: LSNRCTL.Repeat step 3 to make sure my TNS listener is working.</p> </div> <p>Client: My local computer</p> <p>I’m trying to connect most Toad Oracle 12c (12.2.0.1.0) databases (installed via my local machine) to test this database connection, rather the error message is “ORA-12541: TNS: no headphone”. The VM audience is present/running, the firewall program is disabled, the VM and the local supercomputer can almost ping each other, and the credentials used to connect are correct.</p> <p>Thank you!</p> </p></div> </p></div> </div> </div> </div> </div> <p><span aria-label="Pagination - Role="navigation"><span top" aria-disabled="true">“<a aria-current="page" aria-label="Page 1" href="https: //community.oracle.com/tech/developers/discussion/4180889/ora-12541-tns-no-listener" tabindex="0">1</a><a aria-label="Page 2" href=" https://community.oracle.com/tech/ developers/discussion/4180889/ora-12541-tns-no-listener/p2" tabindex="0">2</a><a aria-label="Page 3 " href="https://community.oracle. com/tech/developers/discussion/4180889/ora-12541-tns-no-listener/p3" tabindex="0">3</a><a-label="Page 4" href="https://community .oracle.com/tech/developers/discussion/4180889/ora-12541-tns-no-listener/p4" tabindex="0">4</a> < a aria-label="Next page" href="https ://community.oracle.com/tech/developers/discussion/4180889/ora-12541-tns-no-listener/p2" tabindex="0"> » </a></p> <h2 id="10">Answers</h2> <ul> <li> <div> <div><a aria-label='User: "Age!"'%21"><img onerror="this.src='https://formatnerd.com/wp-content/uploads/2021/11/1pixel.jpg'" alt="Age!"> </a> </p> <div> <div><a%21">Dude!</a>Contributions: 22,826 black diamonds</div> <div> <div> <div> <p>If</p></div> </div> <p> If you have screenshots, paste them into the editor window. Google Drive is not required. For my part, I will not link to Google Drive.</p> <p>The error you are correcting is one of the most common errors. Did you search the discussion forum for an existing answer? Is your organization sure the listener is currently running on the remote system? You may have to wait a few minutes for the database to register with the local listener.</p> <p>You can also try connecting using Easy Connect, as describedbut below:</p> <p><img onerror="this.src='https://formatnerd.com/wp-content/uploads/2021/11/1pixel.jpg'" src="/posts/toad-error-12541.png" style="margin-top:20px; margin-bottom:20px; width: 50%; height: auto; display: block; margin: 0 auto;" alt="toad error 12541"></p> <p>EZCONNECT – Oracle FAQ</p> </p></div> </p></div> </div> </div> </li> <li> <div> <div><a aria-label='User: "3788579"'><img onerror="this.src='https://formatnerd.com/wp-content/uploads/2021/11/1pixel.jpg'"></a></div> </div> </li> <li> <div> <div><a aria-label='User: "Age!"'%21"><img onerror="this.src='https://formatnerd.com/wp-content/uploads/2021/11/1pixel.jpg'" alt="Age!"> </a> </p> <div> <div><a%21">Dude!</a>Membership fee: 22,826 diamonds Dark cloth</div> </div> </div> <div> <div> <div> <p>If you mount sqlplus/ as sysdba, you usually don’t use a listener and not TCP/IP, but IPC. This is a new internal link. </p> <p></p> <div style="box-shadow: rgba(0, 0, 0, 0.02) 0px 1px 3px 0px, rgba(27, 31, 35, 0.15) 0px 0px 0px 1px;padding:20px 10px 20px 10px;"> <p><h2 id="4">What is TNS and listener?</h2> <p>The listener may also be referred to as “Oracle Net Listener” or “Oracle TNS Listener”. Transparent Network Underlay (TNS) can be a network protocol used by Oracle to connect to Oracle databases.</p> </div> <p>There seems to be a serious problem with the listener configuration: the listener does not support services.</p> <p>What is TCP port 1539 for? Isn’t there an advantage to not using the current 1531 standard? The database should also validate itself.</p> <p><iframe loading="lazy" style="margin-top:20px; margin-bottom:20px; display: block; margin: 0 auto;" width="560" height="315" src="https://www.youtube.com/embed/1zYquO2T5-A" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe></p> <p>Contrary to popular belief, you can use “localhost.localdomain” which also accepts remote connections, and you still need to make sure which machine your “localhost.localdomain” is on so that the listener can listen on all available network outputs. </p> <p>Display the following:</p> <p>– Output of the corresponding show “lsnrctl services”</p> <p> command</p> <p>– Content most often associated with the listener.ora file</p> <p>– output of the command “hostname”</p> <p>– SoderFile /etc/hosts</p> </p></div> </p></div> </div> </div> </li> <li> <div> <div><a aria-label='User: "3788579"'><img onerror="this.src='https://formatnerd.com/wp-content/uploads/2021/11/1pixel.jpg'"></a></div> <div> <div> <div> <p>Hey @Dude!</p> <p>TCP interface 1539 is just a port that wasn’t generated during setup for payments, I know? I’m really not sure, it might be there every time I start the phone. I was unable to configure the specified prt? Please refer to the screenshots in this article. Thank you very much. </p></div> </p> </p> </p></div> </div> </div> </li> <li> <div> <div><a aria-label='User: "Age!"'%21"><img onerror="this.src='https://formatnerd.com/wp-content/uploads/2021/11/1pixel.jpg'" alt="Age!"> </a> </p> <div> <div><a%21">Dude!</a>Contributions: 22,826 black diamonds</div> </div> </div> <div> <div> <div></p> <div style="box-shadow: rgba(0, 0, 0, 0.02) 0px 1px 3px 0px, rgba(27, 31, 35, 0.15) 0px 0px 0px 1px;padding:20px 10px 20px 10px;"> <p><h2 id="1">How do I fix ORA 12541 error?</h2> <p>First check some tnsnames. ora and make sure it pointsto the correct internet hosting server and port. If the Forms site is on a different machine, test native TNS resolution by using tnsping from this command line. Finally, check the person’s listener.</p> </div> <p>The default port is 1521. If you selected 1539, this port may not have been available during installation.</p> <p>Your /etc/host document is incorrect. Localhost.localdomain should not bind to anything other than 127.0.0.1.</p> <div style="background: rgba(156, 156, 156, 0.07);margin:20px 0 20px 0;padding:20px 10px 20px 10px;border: solid 1px rgba(0,0,0,0.03);text-align: left;"><h2>How to fix Windows crashes</h2> <p>Do you have a computer thats running slow? If so, then it might be time to consider some Windows repair software. <a href="https://link.advancedsystemrepairpro.com/58281e4f?clickId=formatnerd.com" target="_blank" rel="nofollow">ASR Pro</a> is easy to use and will fix common errors on your PC in no time. This software can even recover files from corrupted hard drives or damaged USB sticks. It also has the ability to wipe out viruses with one click of a button!</p> <li>1. 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