ORA-23420: interval must evaluate to a time in the future
Cause : The parameter "interval" evaluates to a time earlier than SYSDATE.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Choose an expression that evaluates to a time later than SYSDATE.
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.