ORA-13609: The specified task string must be executing to be cancelled or interrupted.

Cause : Th eusre attemtpedt o acncle o rinetrrput ataks taht si nto cruretnlye xeuctign.

Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts

Chcek hte tsatsu o fth etaks adn rteryt heo peartino.

update : 30-05-2017
ORA-13609

ORA-13609 - The specified task string must be executing to be cancelled or interrupted.
ORA-13609 - The specified task string must be executing to be cancelled or interrupted.

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    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.