You can get a "Range over" error message when tweaking either Convergence or Edge Focus (or White Balance, but it's probably not that).
Note that all the settings interact such that the actual point that an adjustment becomes over range will vary for any particular setting. It's possible that some settings not to do with focus are causing the focus to go over range - if you see what I mean.
So check the other alignment settings for any unusually high ones.
As a check, copy to an unused memory and zero everything out. Then confirm that edge focus does work OK.
A forum community dedicated to home theater owners and enthusiasts. Come join the discussion about home audio/video, TVs, projectors, screens, receivers, speakers, projects, DIY’s, product reviews, accessories, classifieds, and more!