I started a brand new test campaign map and seem to have overcome some of the errors I've made in the past. Now it seems I've run into a brand new error and I have absolutely no clue what file(s) need editing for it to work.

The campaign fails to load and I'm kicked back to the menu, when I exit I get the following message:
The character in question is the faction leader of the first listed faction in descr_strat.txt, and as far as I can tell (from map_heights.tga and map_regions.tga) he stands on solid flat ground, map.rwm is deleted, files resized to the required dimensions, RGB values correct in descr_regions.txt etc..

After several hours of research and testing I haven't been able to find a solution, some assistance would be greatly appreciated.