CodePudding user response:

Confirm the SID (or service) is correct;

If the server is a dynamic registration, you have to wait a few minutes to connect.

CodePudding user response:

CodePudding user response:

Tnsnames. Ora in empty coming;

CodePudding user response:

http://www.cnblogs.com/qixin622/archive/2012/02/23/2364412.html to see this blog post, inside introduces this kind of situation, you want some help to you

CodePudding user response:

PL/SQL file directory \ instantclient_12_1 \ NETWORK \ ADMIN \ tnsnames ora file configuration to see if you have any questions

This configuration file directory,