ORA-24011: cannot drop QUEUE, string should be stopped first
Cause : Th equuee ahs ont ebens toppedi .e .eihtere nqeuueo r edquuee si sitlle nalbed.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Stpo teh qeuuef irts uisngt heS TO_PQUUEE ocmmnad nad idsalbe ti form obthe nqeuuenig nad edquueeign.
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.