Test results:
1. Moved an aircraft to runway 8 and opened FS_Earth and FS Navigator, as well as AFCAD2. Also opened the default FS9 airport in AFCAD2. All showed the exact same spot for the threshold/.start point to runway 8.
2. The data in runways.csv as to the co-ordinates of the runway matches that shown in the FS9 onscreen menu, when I move the aircraft to runway 8, and also with the runway co-ordinates shown in AFCAD2 for the AFCAD file used.
3. Co-ordinates in runways.txt agrees with the above as well
4. Searched my whole FS9 installation for other AFCADs that might conflict.. no results.
TGS told me that I had arrived at the runway somewhere near Gate 2, "miles" away.
However, a propos of your reply to my post elsewhere....
the first port of call if the TGS is giving you duff information is to check the afcad file and check that a. All the taxiways "are" linked. b. That they are linked with the correct link form and c. They have correct designations.
.... AFCAD2 did show two taxi links had wrong designators, which I have corrected. That is the only error I found. I corrected it and will try the same flight again later.
Thanks.