Errors encountered during Creating a Physical Standby using Duplicate from Active Database RMAN command

RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of Duplicate Db command at 04/11/2012 14:19:42
RMAN-05557: Target instance not started with server parameter file


I needed to restart the target database using spfile as I was using pfile.