175448936           0 of            1 not allocated
 ----------------------
 Buffer 175448936 in IDATAP
          1        order
          1        inc
  751740601        blksize
          4        wordsize
  175448408        filler
  175451736        reader
         -1        index
          0        maxindex
          1        VM
          1        VMnreal
          0        VMoffset
  175449024        VMlist
     I         VMlist
     0    0
     I  reads   index    datap
     0    0        -1              0
 filler
      175448408 readtiff0
 readers
 sequence 175451736
 175448936         buffer
         0         indexf
         1         type
 175451640         reader
         0         indexr
         0         nextseq
123