The problem was that some packages went corrupt during a previous update. I got to this conclusion after done this.
- Installing TeX Live again (without removing the old installation),
- Testing if the file could be compiled correctly,
- Backing up the packages,
- Activating the old TeX Live installation and restoring it with the backup from the new one, and
- Compiling the file again.
Now which packages went corrupt remains unknown because, before installing TeX Live again, I removed and reinstalled those collection/packages that might be causing the problem (that is collection-fontsextra, collection-fontsrecommended, l3kernel, l3packages and fontspec) and the error persisted.
What bugs me a little is that I don't recall seeing an error message during any of the previous updates besides this one.
Code: Select all
permanent server connection set up, but downloading did not
succeed! Retrying with wget.
I assumed this was corrected since the installation/update continued. Furthermore, although the tlmgr's log file reports a failure during the installation of these packages, on a posterior date the packages appeared as updated.
Another odd thing is that, in the old installation, the file "texlive-fontconfig.conf" (which is needed by XeTeX, see the TeX Live manual, p15) was missing, in fact the were no cache and configuration folders within TEXMFSYSVAR/fonts/
Well, I hope this might help someone with a similar problem.