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I recently updated a TeXLive 2013 installation to 2014 on a server, and XeLaTeX stoped working. First it kept running that
kpathsea: Running mktexfmt xelatex.fmt ... I can't find the format file `xelatex.fmt'!
So I googled and stackoverflowed and saw that I can rebuild this
fmt file with
But it told me that it was trying to get some file:
! I can't find file `dehypht-x-2013-05-26.tex'.