11g r2 duplicate failing with 6172 error

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Oracle Database - Enterprise Edition - Version 11.2.0.2.0 and later
Information in this document applies to any platform.

Symptoms

When trying to do RMAN Duplicate using backup location, it fails with the Error RMAN-06172,
although the Backup piece is available on 'shared' location which can be accessed from the Target Server

RMAN> DUPLICATE TARGET DATABASE TO DB1234
       BACKUP LOCATION '/<shared>/<location>/...' ;      

Cause

 This is due to the Unpublished Bug 14471749 which is in status 11 ( Dev is working on this issue)

Solution

The workaround is to  copy the backup pieces to the 'local' mount point so that RMAN Duplicate runs successfully