TomHinton I am working on project 4138, I am doing nothing special with this one. I originally tried loading LiDAR. That did not work. I deleted the project and started over. Then I tried to simply select an area in OSM for the project. During the map generation project, Thermos faults out, giving the aforementioned error.
My only modification is an HDD value below 2000 at 17C (1991), otherwise I have done nothing unique for this one.