<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  </head>
  <body text="#000000" bgcolor="#FFFFFF">
    <div class="moz-cite-prefix">Ulrike Fischer wrote:
    </div>
    <blockquote type="cite"
      cite="mid:149182325.20200623101042@nililand.de"><br>
      <blockquote type="cite">
        <pre wrap="">Consider the following example:

</pre>
      </blockquote>
      <blockquote type="cite">
        <pre wrap="">  \documentclass[dvipdfmx]{article}
  \begin{document}
  Some \special{pdf:bann}{\Huge\phantom{text}}\special{pdf:eann} goes here
  \end{document}
</pre>
      </blockquote>
    </blockquote>
    <br>
    Processing that example with TeX Live 2020 PdfTeX, I am told :<br>
    <br>
    <blockquote type="cite">This is pdfTeX, Version
      3.14159265-2.6-1.40.21 (TeX Live 2020/W32TeX) (preloaded
      format=pdflatex)
      <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px;
        margin-right:0px; -qt-block-indent:0; text-indent:0px;">
        restricted \write18 enabled.</p>
      <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px;
        margin-right:0px; -qt-block-indent:0; text-indent:0px;">entering
        extended mode</p>
      <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px;
        margin-right:0px; -qt-block-indent:0; text-indent:0px;">(./untitled-1.tex</p>
      <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px;
        margin-right:0px; -qt-block-indent:0; text-indent:0px;">LaTeX2e
        <2020-02-02> patch level 5</p>
      <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px;
        margin-right:0px; -qt-block-indent:0; text-indent:0px;">L3
        programming layer <2020-06-03></p>
      <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px;
        margin-right:0px; -qt-block-indent:0; text-indent:0px;">(c:/TeX/Live/2020/texmf-dist/tex/latex/base/article.cls</p>
      <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px;
        margin-right:0px; -qt-block-indent:0; text-indent:0px;">Document
        Class: article 2019/12/20 v1.4l Standard LaTeX document class</p>
      <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px;
        margin-right:0px; -qt-block-indent:0; text-indent:0px;">(c:/TeX/Live/2020/texmf-dist/tex/latex/base/size10.clo))</p>
      <p style="-qt-paragraph-type:empty; margin-top:0px;
        margin-bottom:0px; margin-left:0px; margin-right:0px;
        -qt-block-indent:0; text-indent:0px;"><br>
      </p>
      <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px;
        margin-right:0px; -qt-block-indent:0; text-indent:0px;">! LaTeX3
        Error: Backend request inconsistent with engine: using 'pdfmode'</p>
      <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px;
        margin-right:0px; -qt-block-indent:0; text-indent:0px;">(LaTeX3)
        backend.</p>
      <p style="-qt-paragraph-type:empty; margin-top:0px;
        margin-bottom:0px; margin-left:0px; margin-right:0px;
        -qt-block-indent:0; text-indent:0px;"><br>
      </p>
      <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px;
        margin-right:0px; -qt-block-indent:0; text-indent:0px;">For
        immediate help type H <return>.</p>
      <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px;
        margin-right:0px; -qt-block-indent:0; text-indent:0px;"> ... </p>
      <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px;
        margin-right:0px; -qt-block-indent:0; text-indent:0px;"> </p>
      <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px;
        margin-right:0px; -qt-block-indent:0; text-indent:0px;">l.2
        \begin{document}</p>
      <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px;
        margin-right:0px; -qt-block-indent:0; text-indent:0px;"> </p>
      <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px;
        margin-right:0px; -qt-block-indent:0; text-indent:0px;">? </p>
    </blockquote>
    <br>
    What engine should I be using ?<br>
    <br>
    Philip Taylor<br>
    <br>
  </body>
</html>