ORA-24814: operation not allowed for temporary LOBs
Cause : Temporary LOB locators are not allowed in the operation. For example: OCILobAssign only takes persistent LOB locators as parameters, not temporary LOBs.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Use OCILobLocatorAssign for temporary LOBs instead. Note that OCILobLocatorAssign can also be used for persistent LOBs, in which case it will behave the same as OCILobAssign.
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.