ToadyOne, I have a reproducible infinite rejections issue, although I wouldn't call it a bug, persay. Check it out below.
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough low altitudes after shift down
The Infinite Domain, region1: Not enough high altitudes after shift up
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough high altitudes after shift up
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough low altitudes after shift down
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough low altitudes after shift down
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough low altitudes after shift down
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough low altitudes after shift down
The Infinite Domain, region1: Not enough entity placement locations
The Infinite Domain, region1: Not enough mountain cave locations after location check
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough mountain cave locations after location check
The Infinite Domain, region1: Not enough low altitudes after shift down
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: No controllable entity definitions available
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough mountain cave locations
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough low altitudes after shift down
The Infinite Domain, region1: Not enough mountain cave locations
The Infinite Domain, region1: Not enough peaks
The Infinite Domain, region1: Not enough peaks
I can easily make this world generate properly by just changing the [TOTAL_CIV_NUMBER:20] to a smaller number, such as 10.