I just started a 4.2 campaign (same basic setup: conventional start + 3 NPR), and I'm getting a 3-4 "Error in GetBodySuitability" errors with every 5-day update (from the very first). I assume it's an NPR who's in a funny system, so I'm going to go look for the problem.
Oooh - that was fun.
It looks like it's the "Sedan Republic". When I made them the default race, their homeworld population (on the F2 screen) showed up as a "mining colony". They look like they've got all the standard facilities (e.g. factories etc.) but no population. I assume there was something wrong with their homeworld, and it turned out un-inhabitable for them. I can't look at it in the F9 screen, though, since Aurora throws another couple errors then crashes with a divide by zero. Looking at the race window (ctrl-F2), their ideal oxygen and maximum deviation are both 0.0atm - I'll bet that's what's causing the divide-by-zero. I'll try a bit longer to get a look at their homeworld, then just obliterate them. I'll let you know if I find anything more.
John
**EDIT** Ok - I was able to get into the home system by giving knowledge of it to another race. It looks perfectly normal - home planet shows up as colony cost 0.0 (for the other race) and O2 is 29% (.23 atm). In particular, there's no methane or other dangerous gasses in the atmosphere. It looks like Aurora burped during NPR creation and set the race to not tolerate O2 (max pressure is at 0.0 as well) and the zero in the O2 range is probably dividing something. Could it have been trying to make this a race of methane breathers?
Two more things I noticed:
1) When I go to the SM "compare systems" screen and look at all the races' home systems, their IDs are labeled 1, 2, 3, 4 (my race + 3 NPR). The same ID shows up on the F9 screen and on the galactic map. Did we lose the random distribution of NPR (i.e. are all 3 NPR right in my back yard and likely to show up as adjacent), or have you hidden the "true" system number?
2) The "adjust WP connectivity" SM dialog seems to have gone away. Or is that controlled through the F9 screen (that I was having trouble getting into) now?
John