How to fix the Oracle error RMAN-04021: target database DBID string does not match channel’s DBID string?

In this post, you’ll learn more about the Oracle ErrorRMAN-04021: target database DBID string does not match channel’s DBID string with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

RMAN-04021: target database DBID string does not match channel’s DBID string

Reason for the Error RMAN-04021: target database DBID string does not match channel’s DBID string

The CONNECT clause in the ALLOCATE command has resulted in a connection to a database which is not the same as the one used to connect to the target database.

How to fix the Error RMAN-04021: target database DBID string does not match channel’s DBID string ?

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

Verify that the CONNECT string connects to the same database as the one specified in the TARGET connection for the CONNECT command.