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<p class="MsoNormal"><span lang="EN-US">Hm… here is what I did:<o:p></o:p></span></p>
<ol style="margin-top:0in" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l4 level1 lfo4"><span lang="EN-US">I first installed MikTeX to the default path that it suggested, and used my private path for LyX. No success.<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l4 level1 lfo4"><span lang="EN-US">Next, I deleted LyX, and tried to re-install it to the default path. But the default path never showed up; no matter whether I deleted every file related to LyX,
 it still stuck to the original path that I had defined.<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l4 level1 lfo4"><span lang="EN-US">I then entered “regedit”. I deleted every mention of LyX in various forms from “regedit”.<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l4 level1 lfo4"><span lang="EN-US">Next, I tried to reinstall LyX. Now it suggested a default path. I installed LyX to this default path.<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l4 level1 lfo4"><span lang="EN-US">Now, it seems to work.<o:p></o:p></span></li></ol>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">In summary: LyX doesn’t properly clean up the registry when I uninstall it.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Another observation…<o:p></o:p></span></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo5"><span lang="EN-US">Before I deleted the registry elements and installed LyX to my private directory, installation of LyX took some one hour or something.<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo5"><span lang="EN-US">After I deleted elements from “regedit”, the installation took a couple of minutes.<o:p></o:p></span></li></ul>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">-B<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="mso-fareast-language:NO-BOK">From:</span></b><span lang="EN-US" style="mso-fareast-language:NO-BOK"> Kees Zeelenberg (kzStats) <kzstatis@gmail.com>
<br>
<b>Sent:</b> Wednesday, June 10, 2020 11:12<br>
<b>To:</b> Bernt Lie <Bernt.Lie@usn.no>; parubin73@gmail.com; lyx-users@lists.lyx.org<br>
<b>Subject:</b> RE: LyX 2.3.5<o:p></o:p></span></p>
</div>
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<p class="MsoNormal"><o:p> </o:p></p>
<div style="border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt">
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span lang="NL" style="mso-fareast-language:NL">Van:</span></b><span lang="NL" style="mso-fareast-language:NL"> lyx-users <<a href="mailto:lyx-users-bounces@lists.lyx.org">lyx-users-bounces@lists.lyx.org</a>>
<b>Namens </b>Bernt Lie<br>
<b>Verzonden:</b> woensdag 10 juni 2020 09:58<br>
<b>Aan:</b> <a href="mailto:parubin73@gmail.com">parubin73@gmail.com</a>; <a href="mailto:lyx-users@lists.lyx.org">
lyx-users@lists.lyx.org</a><br>
<b>Onderwerp:</b> RE: LyX 2.3.5<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><span lang="NL"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">So… I have uninstalled both MikTeX and LyX, and try to re-install them.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">With MikTeX, I do the following:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<ol style="margin-top:0in" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo1"><span lang="EN-US">Choose to install it under directory “C:\\Program_Files\MikTeX\MikTeX_2_9” instead of the default location (“…\AppData\Local\Programs\MikTeX 2.9\”)<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo1"><span lang="EN-US">Settings: Preferred paper size – A4, Install missing pagackages on-the-fly: Yes<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo1"><span lang="EN-US">After MikTeX has installed packages, I check for updates. There were 8 updates, which I installed from “A random package repository on the internet”.
<o:p></o:p></span></li></ol>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Next, I install LyX 2.3.5:<o:p></o:p></span></p>
<ol style="margin-top:0in" start="4" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo1"><span lang="EN-US">I install LyX in directory “C:\Program_Files\LyX\LyX_2_3”<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo1"><span lang="EN-US">The LyX installer finds MikTeX at “C:\Program_Files\MikTeX\MikTeX_2_9\miktex\bin\x64”.
<o:p></o:p></span></li></ol>
<p class="MsoListParagraph"><span lang="EN-US"><o:p> </o:p></span></p>
<ol style="margin-top:0in" start="6" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo1"><span lang="EN-US">LyX takes some time to install, and downloads some missing packages:<o:p></o:p></span></li></ol>
<p class="MsoListParagraph"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoListParagraph"><span lang="EN-US"><img border="0" width="492" height="378" style="width:5.125in;height:3.9375in" id="Picture_x0020_2" src="cid:image001.png@01D63F1F.6D978170"><o:p></o:p></span></p>
<ol style="margin-top:0in" start="7" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo1"><span lang="EN-US">When LyX has been installed, I try to open a template. Result:<o:p></o:p></span></li></ol>
<p class="MsoListParagraph"><span lang="EN-US"><img border="0" width="338" height="251" style="width:3.5208in;height:2.6145in" id="Picture_x0020_3" src="cid:image002.png@01D63F1F.6D978170"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I do a search for file IEEEtran.cls, and it is there:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><img border="0" width="806" height="111" style="width:8.3958in;height:1.1562in" id="Picture_x0020_4" src="cid:image003.png@01D63F1F.6D978170"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Questions:<o:p></o:p></span></p>
<ol style="margin-top:0in" start="1" type="A">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l3 level1 lfo2"><span lang="EN-US">Why doesn’t LyX find this file?<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l3 level1 lfo2"><span lang="EN-US">Is the problem that I have not chosen the default installation path of LyX and/or MikTeX?<o:p></o:p></span></li></ol>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="NL">[KZLG] <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I just had the same error earlier this morning. From my experience:<o:p></o:p></span></p>
<ol style="margin-top:0in" start="1" type="A">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo3"><span lang="EN-US">Probably because the filename database has not been updated. This may happen when you install MikTeX as an administrator (user who has administrative rights), but
 call LyX as that same user but without invoking his administrative rights; or if you have followed some variant of this.<br>
In general, it is best to install as an administrator but call your applications as an ordinary user (i.e. user without any administrative rights), and so keep a strict difference between the two types of users.<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo3"><span lang="EN-US">Perhaps. You might try it if you cannot follow the advice under A.<o:p></o:p></span></li></ol>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Kees<o:p></o:p></span></p>
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