This is makeindex, version 2.15 [TeX Live 2021] (kpathsea + Thai support).
Scanning input file HAPcryst.idx....done (39 entries accepted, 0 rejected).
Sorting entries....done (206 comparisons).
Generating output file HAPcryst.ind....done (86 lines written, 0 warnings).
Output written in HAPcryst.ind.
Transcript written in HAPcryst.ilg.
