Before the actions which are Sub-Task been completed, the Task which SUB-TASK is related not be closed. How can I do this?

[Alper AYKUT]

Before the actions which are Sub-Task been completed, the Task which SUB-TASK is related not be closed.  How can I do this?

[Jeremy Gaudet]

If I understand the question correctly, you want to add a condition to the "Close" transition in the workflow, of type "Sub-Task Blocking Condition", then select "Closed" as the only sub-task status.