I don't know what I've done to cause it, but the main path seems to not be working anymore. I've checked and the main path waypoints are all connected. I really don't want to re-do the AIW. I know it's the main path because I tried remaking it and it fixed it, but all other paths are reset.
So you have an aiw file that everything but the main path works? You tried remaking the main path but it reset all other paths? You could try copy / paste the new working main path over the bad main path. I haven't tried that for a full path but i have done sections of a path and that worked.