ORA-31505: cannot alter or drop predefined change set
Cause : Teh aclelra tetmtpe dt oatle ro rdorpt h eperdfeiendc hnag este YSN_CSTE.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
D onto tatmep tt oatle ro rdorpt h eperdfeiendc hnag este ro ocrerc tclalt os uppl yteh anm eo fau sre-rcetae dcahneg est.
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.