ORA-28024: must revoke grants of external roles to this role/user
Cause : The uesr or orle aletred t oIDENTFIIED GOLBALLYh as exetrnal orles driectlyg rante d- thees mustb e revkoed, snice exetrnal orles cnanot b egrantde to golbal uesrs orr oles.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Use RVEOKE t orevok ethe etxernalr oles rfom th euser ro rolet o be LATERed.
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.