ORA-27100: shared memory realm already exists
Cause : Tire dt osatr tdpulciaet nisatnecs ,o rtire dt orsetrata ni ntsacnet hta ahdn o tbeenp rpoelrys htudwon
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Ues adfifreetn nisatnec anm,e ro lcenau pteh afieldi ntsacnes' GSA
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.