Happened on lv6 on an AoMr game:
#¨¨¨¨¨¨¨¨########¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨>¨¨¨¨Game saved. Press <Enter> to exit.¨¨¨¨#
#¨¨¨¨¨¨¨¨# #¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨0¨¨¨¨¨¨¨0¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨#####¨¨0¨#
#¨¨¨¨¨¨¨¨# #¨¨¨¨¨¨¨¨0¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨#¨¨¨#¨¨¨¨#
#0¨¨¨0¨¨¨# #¨¨¨¨¨#############+######¨¨¨¨¨#+## #####¨¨¨¨¨¨¨¨¨¨#¨¨¨#•¨¨¨#
#¨¨¨¨¨¨¨¨# #¨¨¨¨¨# #¨¨¨•¨# #¨¨¨¨¨¨¨¨¨¨##/##%¨¨¨#
#¨¨¨¨¨¨¨¨# #¨¨¨¨¨# #¨¨¨¨%# #¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨#
#¨¨¨¨¨¨¨¨# #¨¨¨¨¨# ###############¨¨¨¨¨###########¨¨0¨¨¨¨¨¨¨¨####¨¨¨¨#
#¨¨¨¨¨¨¨An unhandled exception occurred at $0046BB40 :¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨#¨¨#¨¨¨¨#
ERangeError : Range check error¨¨¨•%¨¨•%#############¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨#¨¨#¨¨¨¨#
$0046BB40 TLEVEL__VISIBLE, line 434 of dflevel.pas¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨#¨¨/¨¨¨¨#
$0046726F TBEING__SENDMISSILE, line 1292 of dfbeing.pas¨¨¨¨¨¨¨¨¨¨¨#¨¨#¨¨¨¨#
$00462108 TBEING__FIRE, line 537 of dfbeing.pas¨/¨¨¨¨¨¨¨¨########¨#¨¨#¨¨¨¨#
$004638FB TBEING__AISCAN, line 724 of dfbeing.pas¨¨¨¨¨¨¨¨#¨¨¨¨¨¨#¨####¨¨¨0#
$00463E86 TBEING__ACTION, line 777 of dfbeing.pas¨¨¨¨¨¨¨¨#¨¨¨¨¨¨#¨¨¨¨¨¨¨¨¨#
$00463FE7 TBEING__CALL, line 789 of dfbeing.pas¨#¨¨¨¨¨¨¨¨####/###¨¨¨¨¨¨¨¨¨#
$0046E32D TLEVEL__TICK, line 782 of dflevel.pas##¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨#
$0040F30A TDOOM__RUN, line 275 of doombase.pas¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨#
$004019A0 main, line 22 of doomrl.pas######################################
Kagami Armor : blue armor [2/2] (65%)
Abnormal program termination! Please write down the above [6/6] (R1)
to help get rid DoomRL of all those bugs! You only need Phobos Base Lev6
to write down the filenames and linenumbers.
Attempting to save game.... Press <Enter>
Savefile created. Press <Enter>
Seems like a line-of-sight problem to me, but I dunno.
(v9.8.9-win running under Windows Vista Home Premium)