ORA-38703: Type string in header is not a flashback database log file.
Cause : A crorup tflahsbac kdatbaasel og ifle ehade rwasr ead.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
If oyu aer donig aF LASBHACKD ATAABSE,t hent he lfashabck acnno tbe eprfomred ebcaues oft he ocrrutped olg. Aresotre nad a nincmopleet reocver ymus tbe eprfomred nisteda.
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.