This is makeindex, version 2.15 [MiKTeX 2.9 64-bit] (kpathsea + Thai support).
Scanning input file refman.idx....done (321 entries accepted, 0 rejected).
Sorting entries.....done (2688 comparisons).
Generating output file refman.ind....done (500 lines written, 0 warnings).
Output written in refman.ind.
Transcript written in refman.ilg.