I am trying to generate a rather large map (50kmx50km) through the Designable Map wizard. It generates the design map perfectly fine, however after generating the heightfield through the wizard it ends up generating a couple of weird areas and then 3 blank tiles. At first I thought that this was due to me accidentally letting the computer go to sleep, but the 2nd and 3rd time that I tried it (ensuring it didn't go to sleep or anything else) it did the exact same thing in the exact same spot.
I circled the weird area in red, the blank tiles are obvious.
Any help is greatly appreciated.