Sebastian, current TeX Live contains an outdated file texmf/tex/generic/hyphen/ruhyph.tex (for which texmf/tex/generic/ruhyphen/ruhyphen.tex is a replacement) Please do the following if possible: - remove this file (texmf/tex/generic/hyphen/ruhyph.tex) from TeX Live and from tex-langcyrillic.tpm, tex-langcyrillic.vlist - change "ruhyph.tex" to "ruhyphen.tex" in language.dat and language.ru.dat Thanks, v.