[iamhim]

I have several groups of tasks. Each group has couple of dozen tasks. I am not allowed to start tasks from Group 2 until *every* the tasks from Group 1 is not started. Cannot start any task from group 3 until every task from Group 2 is not started. and so on. How do I do that?

I cannot use simple group dependency since Omniplan allows start of any task from Group 2 if any task from Group 1 has started.

Please help.