ORA-26668: STREAMS process string exists
Cause : An atetmpt t oremov ethe cmoponen tfaile dbecaues it i sassocaited wtih theS TREAM Sprocess.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Eithe rremov ethe porcess amnuall yor spceify teh "casacde" otpion i ndbms_tsreamsa_dm.reomve_quuee.
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.