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I recently updated TeX Live to following version

TeX 3.1415926 (TeX Live 2013/Arch Linux)

and cannot compile any file anymore, it fails with error

$ pdflatex blab.tex 
This is pdfTeX, Version 3.1415926-2.5-1.40.14 (TeX Live 2013/Arch Linux)
 restricted \write18 enabled.
---! /var/lib/texmf/web2c/pdftex/pdflatex.fmt doesn't match pdftex.pool
(Fatal format file error; I'm stymied)

After some research, I found out I am supposed to run fmtutil --all, but it also fails with error

$ fmtutil --all
/usr/bin/fmtutil: line 395: /usr/share/texmf/texconfig/tcfmgr: No such file or directory
fmtutil: config file `fmtutil.cnf' not found.

I tried some fixing to no avail: texhash, texconfig rehash do not change anything, and kpsewhich fmtutil.cnf yields /etc/texmf/web2c/fmtutil.cnf, as it is apparently supposed to.

share|improve this question
possibly related to tex.stackexchange.com/q/127529 (similar issue, on windows though). The suggestion there is to run tlmgr update --self --all since there's been a structural update recently. – henrique Aug 9 '13 at 20:13
@henrique tlmgr is not included in Archlinux's version of TeX Live. I tried installing texlive-localmanager, but it does not work. – zuggg Aug 9 '13 at 20:34
@texenthusiast every test failed with the same error as mentioned in the post (well, with latex.fmt instead of pdflatex.fmt for latex, and xetex/xetex.fmt and xetex.pool for xetex). – zuggg Aug 9 '13 at 20:36
@henrique: Waiting is not necessary. Simply update the system (as suggested below: pacdiff && fmtutil-sys --all). – Simon Shine Aug 19 '13 at 23:23
up vote 13 down vote accepted

The new texlive-core package requires user-intervention when updating. Running sudo pacdiff (this replaces existing files with the new .pacnew files) followed by sudo fmtutil-sys --all should fix it.

For more complete instructions, see: https://www.archlinux.org/news/texlive-2013-update-may-require-user-intervention/

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I had the same problem. I was able to solve it with moving all texlive-related .pacnew-files into their new locations. After that, the following steps solved the problem for me:

mv ~/.texlive /tmp
fmutil -all
sudo fmutil -all
sudo texhash
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