This is makeindex, version 2.15 [TeX Live 2018] (kpathsea + Thai support).
Scanning input file DS21-V7.idx....done (711 entries accepted, 0 rejected).
Sorting entries........done (7432 comparisons).
Generating output file DS21-V7.ind....
## Warning (input = DS21-V7.idx, line = 633; output = DS21-V7.ind, line = 6):
   -- Conflicting entries: multiple encaps for the same page under same key.

## Warning (input = DS21-V7.idx, line = 676; output = DS21-V7.ind, line = 27):
   -- Conflicting entries: multiple encaps for the same page under same key.

## Warning (input = DS21-V7.idx, line = 670; output = DS21-V7.ind, line = 44):
   -- Conflicting entries: multiple encaps for the same page under same key.

## Warning (input = DS21-V7.idx, line = 621; output = DS21-V7.ind, line = 99):
   -- Conflicting entries: multiple encaps for the same page under same key.

## Warning (input = DS21-V7.idx, line = 351; output = DS21-V7.ind, line = 106):
   -- Conflicting entries: multiple encaps for the same page under same key.

## Warning (input = DS21-V7.idx, line = 417; output = DS21-V7.ind, line = 191):
   -- Conflicting entries: multiple encaps for the same page under same key.

## Warning (input = DS21-V7.idx, line = 580; output = DS21-V7.ind, line = 205):
   -- Conflicting entries: multiple encaps for the same page under same key.

## Warning (input = DS21-V7.idx, line = 353; output = DS21-V7.ind, line = 235):
   -- Conflicting entries: multiple encaps for the same page under same key.

## Warning (input = DS21-V7.idx, line = 581; output = DS21-V7.ind, line = 264):
   -- Conflicting entries: multiple encaps for the same page under same key.

## Warning (input = DS21-V7.idx, line = 547; output = DS21-V7.ind, line = 305):
   -- Conflicting entries: multiple encaps for the same page under same key.

## Warning (input = DS21-V7.idx, line = 536; output = DS21-V7.ind, line = 312):
   -- Conflicting entries: multiple encaps for the same page under same key.

## Warning (input = DS21-V7.idx, line = 546; output = DS21-V7.ind, line = 319):
   -- Conflicting entries: multiple encaps for the same page under same key.

## Warning (input = DS21-V7.idx, line = 599; output = DS21-V7.ind, line = 373):
   -- Conflicting entries: multiple encaps for the same page under same key.

## Warning (input = DS21-V7.idx, line = 618; output = DS21-V7.ind, line = 391):
   -- Conflicting entries: multiple encaps for the same page under same key.

## Warning (input = DS21-V7.idx, line = 441; output = DS21-V7.ind, line = 441):
   -- Conflicting entries: multiple encaps for the same page under same key.

## Warning (input = DS21-V7.idx, line = 352; output = DS21-V7.ind, line = 482):
   -- Conflicting entries: multiple encaps for the same page under same key.

## Warning (input = DS21-V7.idx, line = 543; output = DS21-V7.ind, line = 496):
   -- Conflicting entries: multiple encaps for the same page under same key.
done (517 lines written, 17 warnings).
Output written in DS21-V7.ind.
Transcript written in DS21-V7.ilg.
