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Just for reference the correct fix (by David) is <br>
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\newcommand\AtEndPackage[2]{\def\temp{\AddToHook{package/after/#1}{#2}}\temp}<br>
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so as a temp fix add</div>
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\renewcommand\AtEndPackage[2]{\def\temp{\AddToHook{package/after/#1}{#2}}\temp}<br>
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before loading hyperref</div>
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An updated memoir has been sent to CTAN<br>
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<span style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; line-height:normal; color:rgb(0,0,0)">/Lars Madsen</span><br>
<span style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; line-height:normal; color:rgb(0,0,0)">Institut for Matematik / Department of Mathematics</span><br>
<span style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; line-height:normal; color:rgb(0,0,0)">Aarhus Universitet / Aarhus University</span><br>
<span style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; line-height:normal; color:rgb(0,0,0)">Mere info:
</span><a href="http://au.dk/daleif@imf" tabindex="0"><span style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; line-height:normal; color:rgb(0,0,0)">http://au.dk/daleif@math</span></a><span style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; line-height:normal; color:rgb(0,0,0)">
/ More information: </span><a target="_blank" href="http://au.dk/en/daleif@imf" tabindex="0"><span style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; line-height:normal; color:rgb(0,0,0)">http://au.dk/en/daleif@math</span></a><br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> David Carlisle <d.p.carlisle@gmail.com><br>
<b>Sent:</b> 04 October 2020 19:20<br>
<b>To:</b> Victor Ivrii <vivrii@gmail.com><br>
<b>Cc:</b> texlive tug <tex-live@tug.org><br>
<b>Subject:</b> Re: Sudden conflict memoir and hyperref</font>
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<div>Memoir switched to use the new hook code but the old version required doubling the # the new one not.</div>
<div>A quick fix would be to add</div>
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<div>\let\OldAtEndPackage\AtEndPackage<br>
\def\AtEndPackage#1{\def\temp{#1}\expandafter\OldAtEndPackage\expandafter{\temp}}</div>
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<div>but that would break if the code was updated, Possibly best would be to make a local copy of memhfixc.sty and replace ## by #</div>
<div>but we'll coordinate with Lars (CC'ed) and get an update to ctan</div>
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<div>David</div>
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<div dir="ltr" class="x_gmail_attr">On Sun, 4 Oct 2020 at 14:28, Victor Ivrii <<a href="mailto:vivrii@gmail.com">vivrii@gmail.com</a>> wrote:<br>
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<div dir="ltr">After tonight update of TL-2020 there is a conflict between memoir and hyperref. </div>
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<p style="margin:0px; font-stretch:normal; font-size:14px; line-height:normal; font-family:Helvetica; color:rgb(0,0,0)">
\documentclass[12pt]{memoir}</p>
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\usepackage{hyperref}<br>
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\begin{document}<br>
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Hello, World</p>
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\end{document}</p>
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<div>Error message:</div>
<div>parameters must be numbered consecutively</div>
<div><to be reward again> </div>
<div> ##</div>
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<div dir="ltr">Replacing memoir with article or switching off hyperref resolves it
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<div>Note that neither hyperref nor memoir were updated, but <span style="color:rgb(0,0,0); font-family:Menlo; font-size:11px">latex was</span></div>
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Victor Ivrii</div>
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