I made this:



No problem whatsover. The game runs for several turns. Note that the big pink area is part of northern britain. So it's just an extra island. Nothing wrong with that, I have done this before.

Now I change it to:



And it crashes before loading! Why? The only change I made was removing some landmass. I've done this quite a few times before and there was no problem. Does anyone have the same problem?

I can only come up with either one of the following:
1. The landmass of western europe is hardcoded to be there. Not very likely but possible.

2. The map needs a certain amount of landmass. Not enough landmass and the game will crash. Perhaps it's a percentage of the total area. So a smaller area needs lesser landmass. Perhaps the game engine requires a certain amount of landtiles?

Any ideas?