C:\brlcad-7.8.4\bin>ERROR: NULL bu_mapped_file pointer, file g_dsp.c, line 3134

C:\brlcad-7.8.4\bin>mged -c
BRL-CAD Release 7.8.4   Geometry Editor (MGED)
    Mon Oct 16 17:26:04 EDT 2006, Compilation 3
    sean@crew.local:/archive/BRL-CAD/brlcad/src/mged

attach (nu|X)[nu]? X
mged> exec fbserv 1 /dev/X &
192
mged>