How to fix the Oracle error RMAN-20039: format requires character when duplexing?

In this post, you’ll learn more about the Oracle ErrorRMAN-20039: format requires character when duplexing with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

RMAN-20039: format requires character when duplexing

Reason for the Error RMAN-20039: format requires character when duplexing

SET_DUPLEX=ON was specified, but %c was not part of the format.

How to fix the Error RMAN-20039: format requires character when duplexing ?

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

Include %c in format, or use %U.