ORA-39951: incomplete values specified for PL/SQL warning settings
Cause : The user either did not enter the value for the settings or entered incomplete values.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Enter correct syntax for the switch.
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.