Registry editor would modified run directly, after I install Oracle, when using Oracle PL/SQL Developer connection ORA - 12541: TNS: no listener, editor before there is listeners, again contrast, built a local service there is no monitoring system TNSListener service operation

CodePudding user response:

Can post a picture below?

CodePudding user response:

I also encountered the same problem, the server firewall 1521 port is not allowed, open good, don't know your problem cause this?

CodePudding user response:

IP is a computer, general automatically obtain IP networking computer after installing the ORACLE, restart the launch would be easy to report the error

CodePudding user response:

1. The monitor service check? Service up? LSNRCTL status
2. Enter the ORACLE_HOME/network/admin/look down a listener. Ora? Open to see content