ORA-19279: XQuery dynamic type mismatch: expected singleton sequence - got multi-item sequence
Cause : The XQuery sequence passed in had more than one item.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Correct the XQuery expression to return a single item sequence.
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.