ORA-28171: unsupported Kerberos version
Cause : the version the Kerberos ticket which the server is to use to validate the identity of the client is not supported.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Specify a supported version.
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.