luatex problem with file with umlauts on windows 10

Zdenek Wagner zdenek.wagner at
Sat Apr 25 16:00:50 CEST 2020

Hi all,

looking at:

(./test-utf8.tex (./grüße.tex)
FILE:   ./grüße.tex
SIZE:   nil
isfile  false

I have three questions:
1. What is your locale of your Windows? Is it UTF-8?
2. Which character set is used for file names on your file system?
3. Are you sure that lfs knows the character set of your file system
(you should query it) and that the file name is corrected to the right

Zdeněk Wagner

so 25. 4. 2020 v 15:55 odesílatel Philip Taylor
<P.Taylor at> napsal:
> Ulrike Fischer wrote:
> I have a problem with the lfs library in luatex and files with
> non-ascii chars on window10:
> This plain tex file
> [snip
> gives this output:
> [snip]
> So the file "grüße.tex" is found fine by kpse and can be input, but
> lfs doesn't access the size.
> Also true for TeX Live 2020 (as of today), Windows 7 Enterprise 64-bit.
> Philip Taylor

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