ORA-22926: specified trim length is greater than current LOB value's length
Cause : The input length for which to trim the LOB value to is greater than the current length of the LOB value.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
May not need to trim the LOB value because it's already smaller than the trim length specified. Or, if trimming the LOB value really is required, use a smaller trim length.
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.