I would like to enable process administrator to have ability to cancell all paralell task in time when not all task are completed (no task completed, some of them completed). One of 7 tasks has also one serial User task (User task 6.1.), which should be also canceled in this case.

For me best solution will be without creating extra "admin" User task for admin, but some solution within Form Edit rules if possible.

Workflow overview:

User task 0 (after user defines which task will be created of 7 (1-7))

Blank activity (gateway) in which are Defined line rules (if Yes than go to task 1..7)

User task 1, User task 2, User task 3, User task 4, User task  5, User task 6, User task 7 (and User task 6.1.)

Blank activity (wait all to complete, i managed with field 1, field 2, .. to destinguis if task was completed)

Plese find enclosed WF diagram.

I appreciate any help!