ORA-22921: length of input buffer is smaller than amount requested
Cause : The buffer length is not big enough to hold the amount of data requested.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Verify that the number of bytes/characters specified in the input amount parameter is not bigger than the number of bytes specified in the input buffer length parameter. Allocate more space for the input buffer if necessary.
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.