This is makeindex, portable version 2.12 [26-May-1993].
Scanning input file tutorial1...
!! Input index error (file = tutorial1, line = 1):
   -- Missing arguments -- need two (premature LFD).
!! Input index error (file = tutorial1, line = 2):
   -- Missing arguments -- need two (premature LFD).
!! Input index error (file = tutorial1, line = 3):
   -- Missing arguments -- need two (premature LFD).
!! Input index error (file = tutorial1, line = 4):
   -- Missing arguments -- need two (premature LFD).
!! Input index error (file = tutorial1, line = 5):
   -- Missing arguments -- need two (premature LFD).
!! Input index error (file = tutorial1, line = 6):
   -- Missing arguments -- need two (premature LFD).
!! Input index error (file = tutorial1, line = 7):
   -- Missing arguments -- need two (premature LFD).
!! Input index error (file = tutorial1, line = 8):
   -- Missing arguments -- need two (premature LFD).
!! Input index error (file = tutorial1, line = 9):
   -- Missing arguments -- need two (premature LFD).
!! Input index error (file = tutorial1, line = 10):
   -- Missing arguments -- need two (premature LFD).
!! Input index error (file = tutorial1, line = 11):
   -- Missing arguments -- need two (premature LFD).
!! Input index error (file = tutorial1, line = 12):
   -- Missing arguments -- need two (premature LFD).
!! Input index error (file = tutorial1, line = 13):
   -- Missing arguments -- need two (premature LFD).
!! Input index error (file = tutorial1, line = 14):
   -- Missing arguments -- need two (premature LFD).
!! Input index error (file = tutorial1, line = 15):
   -- Missing arguments -- need two (premature LFD).
!! Input index error (file = tutorial1, line = 16):
   -- Unknown index keyword images.idx.
done (0 entries accepted, 16 rejected).
Nothing written in tutorial1.ind.
Transcript written in tutorial1.ilg.