My Oracle Support Banner

Troubleshooting Guide for ORA-12545 / TNS-12545 Connect failed because target host or object does not exist (Doc ID 553328.1)

Last updated on AUGUST 16, 2023

Applies to:

Oracle Net Services - Version 9.2.0.8 to 19.5.0.0.0 [Release 9.2 to 19]
Oracle Database - Enterprise Edition - Version 9.2.0.8 to 19.5.0.0.0 [Release 9.2 to 19]
Information in this document applies to any platform.

Purpose

Aids in explaining, diagnosing and resolving the TNS-12545 error or 'host or object does not exist'.
This is an error that typically occurs when a hostname is not resolveable to Oracle.

Troubleshooting Steps

To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!


In this Document
Purpose
Troubleshooting Steps
 Background of the error
 Scenarios:
 Bequeath / Local Connection
 Remote / TCP Connection
 
RAC / Real Application Cluster
 Listener Startup Fails
 Operating System / Hardware Issues
References

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.