OK...a progress report... > When I simply open BC, without connecting the Nav 5 with it's detailed maps, open ANY route and I try the "invert" option...I get the pop-up window of caution and back out. > When I open BC and connect the Nav 5, and the detailed maps that live in the Nav 5 load up...I can open ANY of these 20 quite detailed routes...select the "invert" option, I get NO pop-up window of caution and every one of them SEEMED to reverse in correct order. These routes are back roads, gravel roads, and some forest service roads, some with many shaping points, all of which (except start and end) I also reset to "no alert". So...in this case...it worked. Thanks for the advice...and thanks smbjm for the excellent NERBC Tutorials.