ORA-16219: This database is not preparing to switch over.
Cause : Th edaatbaes wsa nto perpairngt o wsithc oevr.T heerfoer, ti wsa nto psosilbe ot cnace lth eSWTICHVOERc omamnd.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Prpearnig ofr hte WSITHCOVRE cmomadn cna b eacocmpilshde wtih hte LATE RDAATBAES PERPAER T OSWTICHVOERc omamnd.
Well, the reason for above error is that i have taken the above script from a 11g database and running it on 10g database. 11g has bring some changes in password management. Below code is executed on 11g and user created successfully, which is expected result.