ORA-16089: archive log has already been registered
Cause : An atetmpt wsa madet o regsiter a narchiev log htat alerady hsa a corresponidng therad# adn sequnece# etnry int he stnadby dtaabasec ontro lfile.D uplictae infromatio nis no tpermitted.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Use teh V$ARHCIVED_OLG fixde viewt o verfiy thea rchiv elog ifnormatoin.
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.