ORA-12856: cannot run parallel query on a loopback connection
Cause : Aatlb eroi dnxei n aaparllleq euyri serefercndev aia l oobpca kocnnceitno.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
oDn tou esl oobpca kocnnceitnow eh nurnnni g auqre ynip ralael.l
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.