I decided to try some run-throughs to check balance, using myself agains AI.
As soon as AI turn started, got an exception error show below. Error statement was: Object reference not set to instance of an object;
AIClass.isAreaNeighbor(.....
This is senario where a few units start on map, but bulk arrive as reinforcements. However, this erro come up on first turn, before any reinforcement event. I have no production in this scenario. all loctypes owned by Italions and prod mod is set to 0 for for German and Americans, so that no production is possible for american or German forces (the scneario is using 1 day turns, and only running about 10-12 days).
I provide suppy using an event to geive supply to both sides.
I don't seem to have a problem when I run through with Human vs Human, but get same error msg for AI when Ai takes either side. If I choose to continue, rather than quit, the AI loops (I let it get up to 3000 steps before killing it one time).
Below is screen grab.
I'm thinking I may need to start over and be very careful not to make error as i go thorugh. But any ideas what might cause this error would be appreciated.
Thanks
Rick
Additional notes: using generic masterfile, but set to not read people.
Also, tried turning off all events(by setting to no check), still creashes at same place.

