2

Whenever I insert the command \usepackage{siunitx} in my IEEEaccess template document, I get the error \begin{document} missing.

How can I define units in my article if siunitx is not recognized?

My MWE (copied from comment):

\documentclass{ieeeaccess} 
\usepackage{graphicx}
\usepackage{cite} 
\usepackage{amsmath,amssymb,amsfonts} 
\usepackage{algorithmic} 
\usepackage{textcomp} 
\usepackage{siunitx} 

\usepackage{lipsum}
\begin{document} 
\lipsum[1-2]
\EOD 
\end{document}

And this is my log file:

Missing number, treated as zero.

<to be read again> 
                   \gdef 
l.7598 ...onst:Nn \c_sys_year_int  { \tex_year:D }
                                                  
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

Missing = inserted for \ifnum.

<to be read again> 
                   \gdef 
l.7598 ...onst:Nn \c_sys_year_int  { \tex_year:D }
                                                  
I was expecting to see `<', `=', or `>'. Didn't.
You can't use `\numexpr' in vertical mode.

\int_compare:nNnTF ...nt_eval:w #1#2\__int_eval:w 
                                                  #3\__int_eval_end: \exp_af...
l.7598 ...onst:Nn \c_sys_year_int  { \tex_year:D }
                                                  
Sorry, but I'm not programmed to handle this case;
I'll just pretend that you didn't ask for it.
If you're in the wrong mode, you might be able to
return to the right one by typing `I}' or `I$' or `I\par'.

LaTeX Error: Missing \begin{document}.

No \begin{document} command was found. Make sure you have included \begin{document} in your preamble, and that your main document is set correctly.

Was this hint helpful?Yes / No
See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.7598 ...onst:Nn \c_sys_year_int  { \tex_year:D }
                                                  
You're in trouble here.  Try typing  <return>  to proceed.
If that doesn't work, type  X <return>  to quit.
11
  • Welcome to TeX.SX! Did you really use \includepackage{siunitx} or \usepackage{siunitx}? The latter would be correct.
    – leandriis
    Nov 4, 2020 at 8:07
  • Thank you! I just checked, I actually used \usepackage....
    – Wallflower
    Nov 4, 2020 at 8:13
  • 1
    Please provide some small document example (MWE), which reproduce your problem. For example, the following work as expected: \documentclass{ieeeaccess} \usepackage{graphicx} % <--- had to be loaded \usepackage{siunitx} \usepackage{lipsum} \begin{document} \section{Introduction} \lipsum[1] \SI{1}{\kilo\metre} \EOD \end{document}
    – Zarko
    Nov 4, 2020 at 8:19
  • 1
    Please, insert in your question a small document, which reproduce your problem. I have some very large examples used ieeeaccess and they works as expected. BTW, your code from comment works without any warnings or errors!
    – Zarko
    Nov 4, 2020 at 8:42
  • 1
    Show the complete log-file of the small example above. Nov 4, 2020 at 9:14

1 Answer 1

4

The issue is caused as ieeeaccess changes the meaning of \year. In newer releases of expl3, that is covered internally. For older set ups, you can use

\let\oldyear\year
\def\year{%
  \ifdefined\pdfprimitive
    \expandafter\pdfprimitive
  \else
    \expandafter\primitive
  \fi
  \year}
\usepackage{expl3}
\let\year\oldyear
1
  • it worked, thank you so much!
    – Wallflower
    Nov 4, 2020 at 12:02

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