175570464           0 of            1 not allocated
 ----------------------
 Buffer 175570464 in IDATAP
          1        order
          1        inc
 **********        blksize
          4        wordsize
  175570200        filler
  175572104        reader
         -1        index
          0        maxindex
          1        VM
          1        VMnreal
          0        VMoffset
  175570552        VMlist
     I         VMlist
     0    0
     I  reads   index    datap
     0    0        -1              0
 filler
      175570200 differences0
 readers
 sequence 175572104
 175570464         buffer
         0         indexf
         6         type
 175571912         reader
         0         indexr
         0         nextseq
         0         max
123