siunitx version v3.0.2 with xr-hyper

Question

I am typeset the multivolume book. Simplest form looks like:

main file for volume one (vol01.tex)

  \documentclass{scrbook}
    \usepackage{xr-hyper}
    \usepackage{siunitx}
    \usepackage{graphicx}
    \usepackage{caption}
    \usepackage{hyperref}

\begin{document}
  \section{First section}\label{section}
  \begin{figure}[ht!]
    \centering
    \includegraphics{example-image-a}
    \caption{Units \qty{10}{\m}}
    \label{fig:example}
  \end{figure}
 \end{document}

Tex file for volume two (vol02.tex):

\documentclass{scrbook}
  \usepackage{xr-hyper} 
  \usepackage{hyperref}

  \externaldocument[B-]{vol01}[vol01.pdf]% 

\begin{document}
  Link to file \texttt{vol1} figure \ref{B-fig:example} in section \ref{B-section}. 
\end{document}

But the units used in caption leads to error:

...
/uniquecounter.sty")))
! Undefined control sequence.
<argument> Units \qty
           {10}{\m }\relax
l.11 ...nt[B-]{vol01}[vol01.pdf] 

For previous version of siunitx package the solution was to use \protect\SI{10}{\protect\m} according to the Ulrike Fischer solution here. Unfortunately it is no longer be valid.

Is there any other alterntive? For example usage of the zref-xref package.

Answer 1

According to the Ulrike Fischer's comment the solution is:

 \documentclass{scrbook}
  \usepackage{xr-hyper} 
  \usepackage{hyperref}
  \usepackage{siunitx}     

  \begin{document}
    \externaldocument[B-]{vol01}[vol01.pdf]% 

    Link to file \texttt{vol1} figure \ref{B-fig:example} in section \ref{B-section}. 
  \end{document}