ORA-22130: buffer size [string] is less than the required size [string]
Cause : The size of the buffer into which the hexadecimal REF string is to be written is too small.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Provide a buffer of the required size.
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.