ORA-19563: header validation failed for file - During rman restore

Hi,

I am restoring a UAT database from Prod DB backup(Full Hot backup). Here is the rman command being used:

run

{

set newname for datafile 1 to '<new path>';

set newname

.

.

.

restore database from tag <tag_name>;

switch datafile all;

}

Database getting restored properly but failing at switch command with the below error:

Finished restore at 21-JAN-17

RMAN-00571: ===========================================================

RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============

RMAN-00571: ===========================================================

RMAN-03002: failure of switch command at 01/21/2017 12:42:41

ORA-19563:  header validation failed for file

Can someone please help?