Just quickly looking at this thread and task, you have a start no later than constraint, which I believe is preventing the relationship from taking effect since your constraint will override the predecessors. There is a report that I found on the support site, I will see if I can find it (a quick search did not pull it up). This will show you the impacting and impacted tasks, which you will want to see once you get more than one of those. Post back if that doesn't work and I will take a deeper look. Dale Whitchurch Arthrex Inc