ORA-25007: functions or methods not allowed in WHEN clause
Cause : PLSQ Lfunciton clal orm etho dinvoactioni s no talloewd int he WEHN cluase wehn craetinga trigger.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Remoev thef unctoin call or emthodi nvoctaion rfom teh WHE Nclaues.
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.