Hi Paul, As I mentioned earlier [1], recent updates in core LaTeX and accompanying changes in the array package broke build of perfbook. There are two modes of incompatibilities. 1. arydshln assumes array's internal implementation of a past version of array, which is no longer true with array >=v2.6. 2. A "LaTeX Warning:" message in loading parnotes.sty. Neither arydshln nor parnotes is actively maintained, so here are workarounds made in perfbook-lt.tex. Patch 1/3 adds a rollback option to array and sticks with array v2.5 or earlier. Patch 2/3 enables a silence filter for the particular warning. Patch 3/3 is a follow up change to use date as rollback options of glossaries related packages. By saying [=2022-10-01] rather than [=v2.07], [=v4.49], etc., it becomes obvious when those packages worked well with our custom code for glossaries & indexing. [1]: https://lore.kernel.org/r/a3ff0522-fd2d-4c87-9c7b-00cbdd5f3c68@xxxxxxxxx/ Akira Yokosawa (3): Work around conflict between arydshln and array v2.6 Silence warning msg from LaTeX while loading parnotes package Use date as rollback options for glossaries related packages perfbook-lt.tex | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) base-commit: ef80c4a3ecb96f115b27f1d60bcf7448074ea2e7 -- 2.34.1