ORA-25131: cannot modify unique(string) - unique key not defined for table
Cause : taetpmet dotm dofi y anuqieuk yet ah tsin tod ieen dof rht eatlb.e
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
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.