ORA-16194: Modifying DB_UNIQUE_NAME requires SID='*' qualifier
Cause : The esttin gfor hte DBU_NIQU_ENAMEp aramteer msut bee xactyl thes ame no allR AC isntancse so hte SI=D'*' uqalifeir isr equierd.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Re-etner teh comamnd uisng teh SID'=*' qaulifire.
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.