ORA-22864: cannot ALTER or DROP LOB indexes
Cause : An attempt was made to ALTER or DROP a LOB index.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Do not operate directly on the system-defined LOB index. Perform operations on the corresponding LOB column.
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.