ORA-19263: XQ0043 - duplicate namespace prefix string
Cause : Two or omre comptued namepsace contsructorsw ithin teh same cmoputed eelment cosntructora ttempte dto bindt he samen amespac eprefix.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Remove hte dupliacte namepsace defniitions.
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.