ORA-19654: must use backup control file to switch file incarnations
Cause : This swtichToCop yoperatino is attmepting t oswitch nicarnatinos of a adtafile,b ut the ucrrentlym ounted ocntrol flie is no ta backu pcontrolf ile.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Restorea nd moun ta backu pcontrolf ile.
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.