167077200           0 of            1 not allocated
 ----------------------
 Buffer 167077200 in IDATAP
          1        order
          1        inc
 **********        blksize
          4        wordsize
  167076920        filler
  167078592        reader
         -1        index
          0        maxindex
          1        VM
          1        VMnreal
          0        VMoffset
  167077304        VMlist
     I         VMlist
     0    0
     I  reads   index    datap
     0    0        -1              0
 filler
      167076920 differences0
 readers
 sequence 167078592
 167077200         buffer
         0         indexf
         1         type
 167078520         reader
         0         indexr
         0         nextseq
123