Good Morning Richard I haven’t played too much with master/sub projects, but one question comes to mind. Why do you have a “What If” scenario schedule included in your published master schedule? It seems to me that the easiest solution is to simply remove that schedule from the master. There are formal steps for decoupling the two schedules (which I’d have to research), but you might be ably to inactivate the sub-project task in the master schedule. Just a thought. If the problem schedule must be included because of actual hours, other work, or other scenarios, then Larry is spot on. The problem needs to be corrected in the sub-project schedule.