How to fix the Oracle error TNS-04011: Oracle Connection Manager instance not yet started.?

In this post, you’ll learn more about the Oracle ErrorTNS-04011: Oracle Connection Manager instance not yet started. with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

TNS-04011: Oracle Connection Manager instance not yet started.

Reason for the Error TNS-04011: Oracle Connection Manager instance not yet started.

Cause: A command was issued when Oracle Connection Manager was not yet started or already shutdown.

How to fix the Error TNS-04011: Oracle Connection Manager instance not yet started. ?

You can fix this error in Oracle by following the below steps

Action: Start Oracle Connection Manager.