Hmm I've tried that. I copied everything to a new folder (wilkes -> north_wilkesboro), changed the corresponding names to the dat, cam, and ptf, and put the trackmat folder (which has everything in the dat) in the track folder (see attached). New Folder is my working folder, where I've unpacked everything. I have also tried removing it from the track folder and receive the same error.
And you are correct, I did not change the geometry. In fact, all I did was open the ptf in sandbox and click save, without changing anything. It asked me if I wanted to center the track. I tried both Yes and No (before when I've encountered that prompt on other tracks and clicking Yes seems to break it if I remember, perhaps because it makes the LPs invalid?).
I am quite puzzled to say the least.
And you are correct, I did not change the geometry. In fact, all I did was open the ptf in sandbox and click save, without changing anything. It asked me if I wanted to center the track. I tried both Yes and No (before when I've encountered that prompt on other tracks and clicking Yes seems to break it if I remember, perhaps because it makes the LPs invalid?).
I am quite puzzled to say the least.