ORA-19686: SPFILE not restored due to string
Cause : The indicated file could not be restored, because some of its data blocks were not found in the backup piece.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Unless the damage to the backup set can be repaired, the SPFILE cannot be restored from this backup set.
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.