This is makeindex, version 2.15 [TeX Live 2018/W32TeX] (kpathsea + Thai support). Scanning input file GradualeMonasterienseParsTertia-Anti.idx...done (0 entries accepted, 0 rejected). Nothing written in GradualeMonasterienseParsTertia-Anti.ind. Transcript written in GradualeMonasterienseParsTertia-Anti.ilg.