i want to "close" or "delete" any task ,which has status   open,waiting,finished of my account.i have tried it,but i can't.the task with status closed , i can delete that one.
how it is ??????

As such it is not possible to delete a task unless it is closed.
To be clear I am giving the flow, how a task can be deleted by the initiator according to its status.

1.Open > finish > Close > Delete

2.Waiting > Subtask to be finished > Parent task to be finished > Close > Delete

3.Aborting > (The executor must have to finish the task) > Close > Delete

4.Finished > Close > Delete

5.Closed > Delete

Thanks

thanks for replying............