After updating my geometry in Flair 3.3 I had an problem starting a run, with error like this in *.err file:
"1Invalid region or body in Normal. IR= 27 LAT= 0 NASC= 0
IRRNOR= 0 IR1(IR)= 27 IR2(IR)= 27
X,Y,Z: -1434.39522920 -1.45089458292 -447.110000000
Abort called from FLKNRM reason UNKNOWN PROBLEM Run stopped!
STOP UNKNOWN PROBLEM"
Thing is, there was everything just fine at " X,Y,Z: -1434…" and the problem was in 2 unidentified regions I missed. But I was only able to track it in the older version of Flair 3.2 (which showed >e> ERROR: Region x empty expression at the start).
Please look at this problem in new version of Flair, seems like empty expressions are not checked, but they do mess things up a lot.