# lualatex: pdfx and siunitx conflict on angstrom [closed]

I encountered a conflict between the siunitx and pdfx packages. I had a document working, but after I added the pdfx package I ended up with an

! LaTeX Error: Command \AA unavailable in encoding TU.


Minimal working example (test_angstrom.tex):

\documentclass{report}
\usepackage[a-2u]{pdfx} % Force required PDF/A-2u format

\usepackage{siunitx} % Numbers and quantities

\begin{document}
\SI{1}{\angstrom}
\end{document}


A file with metadata test_angstrom.xmpdata needs to exists. I compile the source with lualatex. When I remove the pdfx package everything works. Any idea how can I introduce the angstrom symbol to the pdfx package?

## closed as off-topic by TeXnician, Phelype Oleinik, Stefan Pinnow, Troy, user36296Sep 26 '18 at 21:07

• This question does not fall within the scope of TeX, LaTeX or related typesetting systems as defined in the help center.
If this question can be reworded to fit the rules in the help center, please edit the question.

• I get no error. Is your system up-to-date? Edit: I get it with texlive 2016, with newer it is ok. – Ulrike Fischer Jun 20 '18 at 21:12
• \AA is not encoding specific, which might account for this issue. You could try defining the character and using that instead, as shown in a related answer. – Coby Viner Jun 20 '18 at 21:53
• @UlrikeFischer: It was the old texlive version, thanks. – ziima Jun 25 '18 at 20:48
• I'm voting to close this question as solved by using an up-to-date TeX distro. – TeXnician Sep 26 '18 at 18:01