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Anonymous's avatar
Anonymous
Not applicable
9 years ago
Solved

Unable to connect using Oracle database and ODBC

Hi team,

 

i have access to an oracle database but for some reason I cannot access the database and keep getting error message stating "Oralce: ORA-12541: TNS: No Listener". I have tried the following as stated other knowledge base

 

1. Update the tnsname file

2. Update the host information in listener and tnsname

3. uninstall and reinstall the oracle instant client

4. updated the environment variables

 

Having said the above, I went to verify if my connection from the ODBC driver works fine and I'm able to connect successfully but cannot connect via Data > New Query >  Database > Oracle Database and the same applies for ODBC.

 

Please advise....A!

Tips and Tricks
  • Anonymous's avatar
    Anonymous
    9 years ago

    Anonymous Apologies for getting back so late but I found a solution for this to work.

     

    New Query > connect to DB > Oracle Database > in the servername the syntax to use is "hostname:[port number] /SID" which I was using only as host ID. After this update, it all worked fine.

     

    Thanks again for the help.

     

    Kind regards,

    Anand

8 Replies

  • Anonymous's avatar
    Anonymous
    Not applicable
    9 years ago

    Hi Anonymous,

    Do you use Power BI Desktop to connect to remote Oracle database? If that is the case, there are some proposals for you  troubleshooting this issue.

    1. Make sure you have installed the latest version of Oracle client following the instructions in this article. Ensure that your Oracle client, Oracle Server and Power BI  Desktop have the same bitness(32bit or 64bit).

    2. Make sure the Host IP you update in listener.ora is correct, you can use ipconfig command to verify the Host IP.

    3. Restart LISTENER with the following commands.

        lsnrctl  stop

        lsnrctl  start

    4. Use TNSPING to test the connectivity from Desktop to Oracle server.

    5. When connecting to Oracle from Power BI desktop, enter the connection details in TNSnames.ora file, then check if it is successful. Alternatively, you can connect to the Oracle Database via EZConnect connection string. For more details, please review this similar blog.


    Thanks,
    Lydia Zhang

    • Anonymous's avatar
      Anonymous
      Not applicable
      9 years ago

      Hi Lydia,

       

      I have tried the following and still have the same issue

       

      1. manually updated the listener.ora file with the host information (available used based on cmd > hostname)

      2. deleted and re-configured listener.ora using the net assistant part of Oracle home

      3. I've both Power BI for desktop and the Oracle server running 64-bit

      4. tried to run the commands lsnrctl > start or services but i get message as mentioned below

         TNS-12560: TNS: protocol adapter error
         TNS-00530: Protocol adapter error

       

      Not sure what am I doing incorrect here. Please advice.

       

      Kind regards,

      Anand

       

      • Anonymous's avatar
        Anonymous
        Not applicable
        9 years ago

        4. tried to run the commands lsnrctl > start or services but i get message as mentioned below

           TNS-12560: TNS: protocol adapter error
           TNS-00530: Protocol adapter error

         

         

         Hi Anonymous,


        About the above error message, I would recommend you post it in Oracle forum to get dedicated support.

        Thanks,
        Lydia Zhang

         

    • brianscott's avatar
      brianscott
      New Member
      8 years ago

      Kind of a necromancer reply.  But let's say that I work in an environment where I have 32 bit oracle instances holding some data, and 64 bit oracle instances holding other data.   Do I need two installs of Power BI to get this to go?  What I want to blend the data?