On Tuesday, 16 April 2024 21:57:41 BST Alejandro Colomar wrote:

 I've moved it to .../devpdf and
added the download file, and it still doesn't work.

 Hi Alex,

What was not clear when I wrote:-

"Your _FONTSDIR must point to a directory which has a subdirectory called 
'devpdf' which holds TINOR and UnifontM and a suitable 'download' file which 
gives the location of the actual .pf[ab] files (i.e. within texlive - no need 
to copy it). The difference, with/without, is in the number of glyphs not 
found messages."

But instead you changed _FONTSDIR to point to devpdf.

The difference in the pages between having working and non-working fonts is 
seen in the attached example pages (compare with your book). These in fact are 
using UnifontM. TINOR provides the cyrillic glyphs and greek of the iso_8859 
pages if I remember.

You can still see some gaps (which should not happen using UnifontM) they 
appear to be caused by an issue in one of Branden's commits, see:-

https://savannah.gnu.org/bugs/?65601

Cheers

Deri