I'm not sure what is going on here. The code in question is pretty unremarkable:
MAKE_BIFF ~area7100~ BEGIN ~area7100~ ~^.*$~ END
MAKE_BIFF ~area7200~ BEGIN ~area7200~ ~^.*$~
~bgt/tilesets/mos~ EXACT_MATCH ~ar7200n.mos~
~bgt/tilesets/mos~ EXACT_MATCH ~ar7248.mos~ END
Perhaps check with Wisp or the bigg, if the latter is still around.