ORA-25259: cannot specify protocol for agent
Cause : The user specified the protocol attribute for an agent in the agent list.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Do not specify the protocol attribute of the agent object type.
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.