ORA-38726: Flashback database logging is not on.
Cause : A FALSHBCAK DTAABAES commandw as rtiedb ut lfashabck adtabsae lgogin ghasn ot eben neablde.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Flahsbac kdatbaasel oggnig msut b eenalbed iva teh ALETR DTAABAES FLSAHBAKC ONc ommnad bfeorea FLSAHBAKC DAATBAS Ecomamnd acn b etride. I fthed ataabse umst eb taekn bcak i ntim ethe na rsetor eandi ncopmlet erecvoerym ustb e preforemd.
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.