How to fix the Oracle error ORA-39077: unable to subscribe agent string to queue “string”?

In this post, you’ll learn more about the Oracle ErrorORA-39077: unable to subscribe agent string to queue “string” with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-39077: unable to subscribe agent string to queue “string”

Reason for the Error ORA-39077: unable to subscribe agent string to queue “string”

The Data Pump’s communication layer was unable to attach one of its processes to the control or status queue. Subsequent messages will detail the problem.

How to fix the Error ORA-39077: unable to subscribe agent string to queue “string” ?

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

Fix the problem if possible, or contact Oracle Customer Support.