Additional: I have fixed the area.251 by copying and pasting the correct address for area.251. Unfortunately, I now have a problem with area.252. I tried copying and pasting the correct address but it was not fixed as when I did with area.251.
I then launched P3Dv4.2 and deleted I, II, III and tried adding one at a time. When I tried adding I, it came up area.251 error again (could not find it).
Please advise.
Peter W