[luatex] luaotfload problems on windows (TL + Miktex)

[Ulrike Fischer]

I found some time to update today miktex and texlive and would like
to report some luaotfload problem.

I used a small document for the tests which loads an system font:

\documentclass{scrartcl}
\usepackage{fontspec}
\setmainfont{Arial}
\begin{document}
blub
\end{document}

I deleted the fonts caches before the tests. 

Problems
1. luaotfload can't create the font database on-the-fly during the
compilation:

luaotfload | db : Font names database not found, generating new one.
luaotfload | db : This can take several minutes; please be patient.
luaotfload | db : Failed to save names database
luaotfload | db : Database creation unsuccessful.

And there is nothing in the "names" folder.
This happens in texlive + miktex. 

Running 
  luaotfload-tool --update --force --vv
works fine and creates the database. 


2. Miktex/installation specific:
Miktex hanges while create the cache for a new font and shows a lua
prompt:

luaotfload | db : Database creation unsuccessful.
luaotfload | load : loading the extended glyph list from ConTeXt
lua> 

The problem seems to be that luaotfload tries to load font-age.lua
which doesn't exist on a normal miktex system (there is not context)

3. lualatex compiles fine after I created the font databases with
luaotfload-tool, but the log (both systems) shows a lot of this
messages:

luaotfload | cache : Could not write lookup cache
luaotfload | cache: Could not write to cache
luaotfload | cache : Could not write to cache


-- 
Ulrike Fischer 
http://www.troubleshooting-tex.de/