E1:     C1 CALL pred mismatch_on_call.main/2-0 (det) mismatch_on_call.m:17
mdb> mdb> Contexts will not be printed.
mdb> echo on
Command echo enabled.
mdb> 
      E2:     C2 CALL pred mismatch_on_call.p/4-0 (det)
mdb> f
      E3:     C2 EXIT pred mismatch_on_call.p/4-0 (det)
mdb> dd -d 3 -n 7
p(1, 2, 204, 202)
Valid? b 4
browser> mark
q(102, 202)
Valid? n
Found incorrect contour:
q(102, 202)
Is this a bug? y
      E4:     C3 EXIT pred mismatch_on_call.q/2-0 (det)
mdb> quit -y