Oracle Duplicate Database restore fails with RMAN-06403 and RMAN-04006 (4035804)

A successful Duplicate database backup has been taken.
This Duplicate Database backup is to be restore to an alternate Oracle server with the same directory structureas the source Oracle server.
As per the NetVault Oracle APM documentation, all conditions and prerequisites have been met for a successful restore.
The auxiliary database (alternate) has been correctly prepared and started in NOMOUNT state.

However the restore fails with the below log messages:

RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of Duplicate Db command at 02/11/2013 09:14:20
RMAN-06403: could not obtain a fully authorized session
RMAN-04006: error from auxiliary database: ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist