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    <div class="moz-cite-prefix">On 6/9/20 11:15 AM, Bernt Lie wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:VI1PR09MB2304F41219611632D18880829C820@VI1PR09MB2304.eurprd09.prod.outlook.com">
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      <div class="WordSection1">
        <p class="MsoPlainText"><span lang="EN-US">I installed LyX 2.3.5
            a couple of days ago (?), and it worked fine. (Windows 10
            64bit, latest version.)<o:p></o:p></span></p>
        <p class="MsoPlainText"><span style="color:black" lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoPlainText"><span style="color:black" lang="EN-US">Today,
            one of my students tried to install some template for LyX
            2.3.5, and messed around with MikTeX. But in the end that
            didn't work. So in the end, I uninstalled MikTeX, Inkscape,
            and LyX, and re-installed the programs.<o:p></o:p></span></p>
        <p class="MsoPlainText"><span style="color:black" lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoPlainText"><span style="color:black" lang="EN-US">Now
            I get this error message:<o:p></o:p></span></p>
        <p class="MsoPlainText"><span style="color:black" lang="EN-US"><img
              style="width:3.6979in;height:2.6458in"
              id="Picture_x0020_1"
              src="cid:part1.6DB06848.824443F5@gmail.com" class=""
              width="355" height="254"></span><span style="color:black"
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoPlainText"><span style="color:black" lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoPlainText"><span style="color:black" lang="EN-US">When
            I try to open a template.<o:p></o:p></span></p>
        <p class="MsoPlainText"><span style="color:black" lang="EN-US"><o:p> </o:p></span></p>
        <ul style="margin-top:0in" type="disc">
          <li class="MsoPlainText" style="color:black;mso-list:l0 level1
            lfo1"><span lang="EN-US">What has gone wrong? Why is
              “extarticle.cls” missing?<o:p></o:p></span></li>
          <li class="MsoPlainText" style="color:black;mso-list:l0 level1
            lfo1"><span lang="EN-US">How can I fix it?<o:p></o:p></span></li>
        </ul>
        <p class="MsoPlainText"><span style="color:black" lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoPlainText"><span style="color:black" lang="EN-US">-B<o:p></o:p></span></p>
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      <br>
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    </blockquote>
    Oops! I inadvertently replied to Bernt offline, suggesting that the
    extsizes package had not been installed. Pasting in his reply:<br>
    <br>
    <blockquote type="cite"> did nothing special to include specific
      packages a couple of days ago, and nothing special today.</blockquote>
    It's been quite a while since I used MikTeX, but I vaguely recall
    that installation options included a modest size package with common
    classes and something of an omnibus installation with all sorts of
    packages (and a large footprint). Bernt, is it possible that you did
    a full installation in the case that the document class was
    available and a smaller installation in the case where it was not?<br>
    <br>
    I'm assuming here that basic classes (such as article.cls) remain
    available even when extarticle.cls does not.<br>
    <br>
    Paul<br>
    <br>
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