oracle client ORA-12541: TNS: 无监听程序

1. Question description:

    if you are setting the oracle client to add a local network service,  you may see the dialogue that show you the message

    (oracle client ORA-12541: TNS: 无监听程序).

2.you can check the listener first, with command (lsnrctl status; lsnrctl start)

as the image describe, the listener object is wrong.

3. Solution:

you need to find the .ora file , and modify with the host name.