ORA-12842: Cursor invalidated during parallel execution
Cause : The cursor was invalidated during the parse phase of deferred parallel processing, e.g. when set operands are parallelized.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Depends on why the cursor was invalidated. Possible causes include DDL on a schema object and shared pool being flushed.
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.