<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Mystery solved:<div class=""><br class=""></div><div class=""> In ~/Library/texmf/web2c I still had an old .fmt for the book-length document that I had fashioned out of its preamble.</div><div class=""><br class=""></div><div class="">As soon as I trashed that .fmt, the document compiled normally.</div><div class=""><br class=""></div><div class="">My memory (from last working on the document a couple of months ago) was jogged after I worked around the langbasque issue by adding </div><div class=""><span class="hljs-keyword" style="font-family: inherit; font-style: inherit; font-variant-caps: inherit; white-space: inherit; color: var(--highlight-keyword); font-size: 13px; margin: 0px; padding: 0px; border: 0px; font-stretch: inherit; line-height: inherit; vertical-align: baseline; box-sizing: inherit;"><br class=""></span></div><div class=""><span class="hljs-keyword" style="font-family: inherit; font-style: inherit; font-variant-caps: inherit; white-space: inherit; color: var(--highlight-keyword); font-size: 13px; margin: 0px; padding: 0px; border: 0px; font-stretch: inherit; line-height: inherit; vertical-align: baseline; box-sizing: inherit;"><span class="Apple-tab-span" style="white-space:pre"> </span>\NewBibliographyString</span><span style="font-family: inherit; font-style: inherit; font-variant-caps: inherit; white-space: inherit; color: var(--highlight-color); font-size: 13px;" class="">{langbasque}</span></div><div class=""><span class="hljs-keyword" style="font-family: inherit; font-style: inherit; font-variant-caps: inherit; white-space: inherit; color: var(--highlight-keyword); font-size: 13px; margin: 0px; padding: 0px; border: 0px; font-stretch: inherit; line-height: inherit; vertical-align: baseline; box-sizing: inherit;"><span class="Apple-tab-span" style="white-space:pre"> </span>\NewBibliographyString</span><span style="font-family: inherit; font-style: inherit; font-variant-caps: inherit; white-space: inherit; color: var(--highlight-color); font-size: 13px;" class="">{frombasque}</span></div><div class=""><br class=""></div><div class=""> to the preamble. But when I next latex’ed the document, I got a really weird error about a mismatch of character width, and that got the little gray matter working harder.</div><div class=""><br class=""></div><div class="">Thank you for your indulgence!<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On 18 Feb2021, at 4:34 PM, Murray Eisenberg <<a href="mailto:murrayeisenberg@gmail.com" class="">murrayeisenberg@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta http-equiv="Content-Type" content="text/html; charset=utf-8" class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div class="">I just used TLU to reinstall biblatex. But still the same error! From the log:</div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Menlo;" class="">Package biblatex Info: Trying to load language 'english' -> 'mylanguagestrings'</div><div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Menlo;" class="">...</div><div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Menlo;" class="">Package biblatex Info: ... file 'mylanguagestrings.lbx' found.</div><div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Menlo; min-height: 14px;" class=""><br class=""></div><div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Menlo;" class="">(/Users/murray/Library/texmf/tex/latex/biblatex/lbx/mylanguagestrings.lbx</div><div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Menlo;" class="">File: mylanguagestrings.lbx </div><div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Menlo;" class="">Package biblatex Info: Trying to load language 'english'...</div><div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Menlo;" class="">Package biblatex Info: ... file 'english.lbx' found.</div><div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Menlo; min-height: 14px;" class=""><br class=""></div><div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Menlo;" class="">(/usr/local/texlive/2020/texmf-dist/tex/latex/biblatex/lbx/english.lbx</div><div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Menlo;" class="">File: english.lbx 2020/08/23 v3.15a biblatex localization (PK/MW)</div><div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Menlo;" class="">)</div><div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Menlo;" class="">Package biblatex Info: Trying to load language 'english'...</div><div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Menlo;" class="">Package biblatex Info: ... file 'english.lbx' found.</div><div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Menlo; min-height: 14px;" class=""><br class=""></div><div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Menlo;" class="">(/usr/local/texlive/2020/texmf-dist/tex/latex/biblatex/lbx/english.lbx</div><div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Menlo;" class="">File: english.lbx 2020/08/23 v3.15a biblatex localization (PK/MW)</div><div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Menlo; min-height: 14px;" class=""><br class=""></div><div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Menlo; min-height: 14px;" class=""><br class=""></div><div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Menlo;" class="">/usr/local/texlive/2020/texmf-dist/tex/latex/biblatex/lbx/english.lbx:571: Pack</div><div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Menlo;" class="">age xkeyval Error: `langbasque' undefined in families `blx@lbx’.</div><div style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Menlo;" class=""><br class=""></div><blockquote type="cite" class=""><div class="">On 18 Feb2021, at 3:35 PM, Herbert Schulz <<a href="mailto:herbs@wideopenwest.com" class="">herbs@wideopenwest.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class=""><br class=""><br class=""><blockquote type="cite" class="">On Feb 18, 2021, at 1:44 PM, Murray Eisenberg <<a href="mailto:murrayeisenberg@gmail.com" class="">murrayeisenberg@gmail.com</a>> wrote:<br class=""><br class=""><blockquote type="cite" class=""><br class="">On 18 Feb2021, at 1:24 PM, Herbert Schulz <<a href="mailto:herbs@wideopenwest.com" class="">herbs@wideopenwest.com</a>> wrote:<br class=""><br class=""><br class=""><blockquote type="cite" class="">On Feb 18, 2021, at 11:37 AM, Murray Eisenberg <<a href="mailto:murrayeisenberg@gmail.com" class="">murrayeisenberg@gmail.com</a>> wrote:<br class=""><br class="">/usr/local/texlive/2020/texmf-dist/tex/latex/biblatex/lbx/english.lbx:571: Pack<br class="">age xkeyval Error: `langbasque' undefined in families `blx@lbx'.<br class=""></blockquote><br class="">Howdy,<br class=""><br class="">Hmmm... in /usr/local/texlive/2020/texmf-dist/tex/latex/biblatex/lbx/english.lbx I see a definition of langbasque on line 473; line 571 is the end of that structure list. Are you up to date?<br class=""><br class=""><blockquote type="cite" class=""><br class="">And in /Library/texmf/tex/latex/biblatex/lbx I have the referenced file mylanguagestrings.lbx which includes the following:<br class=""><br class=""></blockquote><br class="">From the information given I assume there is a missing ~ in front of /Library/texmf/tex/latex/biblatex/lbx.<br class=""><br class="">Sorry I can't be more helpful.<br class=""><br class=""></blockquote><br class="">According to answer <a href="https://tex.stackexchange.com/a/583988/13492" class="">https://tex.stackexchange.com/a/583988/13492</a>, the issue is my biblatex installation not being up to date. But:<br class=""><br class=""><span class="Apple-tab-span" style="white-space:pre"> </span>- I have run the TexLive Utility to keep everything up to date;<br class=""><br class=""><span class="Apple-tab-span" style="white-space:pre"> </span>- kpsewhich biblatex.sty leads me to the file version 3.16 dated 2020/12/31, yet …<br class=""><br class=""><span class="Apple-tab-span" style="white-space:pre"> </span>- in the log (from a file listing) I see: biblatex.sty 2020/08/23 v3.15a programmable bibliographies (PK/MW)<br class=""><br class="">So I don’t know what to do to force use of biblatex 3.16.<br class=""><br class="">Yes, I unintentionally elided the ~ in the path to my mylanguagestrings.lbx .<br class=""><br class="">---<br class="">Murray Eisenberg<span class="Apple-tab-span" style="white-space:pre"> </span><span class="Apple-tab-span" style="white-space:pre"> </span><span class="Apple-tab-span" style="white-space:pre"> </span><a href="mailto:murrayeisenberg@gmail.com" class="">murrayeisenberg@gmail.com</a><br class="">503 King Farm Blvd #101<span class="Apple-tab-span" style="white-space:pre"> </span><br class="">Rockville, MD 20850-6667<span class="Apple-tab-span" style="white-space:pre"> </span>Mobile (413)-427-5334<br class=""></blockquote><br class="">Howdy,<br class=""><br class="">I believe that the log file gives the full path to biblatex.sty at the point where it's being loaded; e.g., for a sample file I see<br class=""><br class="">...<br class="">(/usr/local/texlive/2020/texmf-dist/tex/latex/biblatex/biblatex.sty<br class="">Package: biblatex 2020/12/31 v3.16 programmable bibliographies (PK/MW)<br class="">...<br class=""><br class="">Are you sure you're using TeX Live 2020?<br class=""><br class="">You could use TLU to force a re-install of biblatex if really needed.<br class=""><br class="">Good Luck,<br class=""><br class="">Herb Schulz<br class=""><a href="mailto:herbs@wideopenwest.com" class="">herbs@wideopenwest.com</a><br class=""><br class=""><br class=""></div></div></blockquote></div><br class=""><div class="">
<div style="letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">---<br class="">Murray Eisenberg<span class="Apple-tab-span" style="white-space: pre;"> </span><a href="mailto:murrayeisenberg@gmail.com" class="">murrayeisenberg@gmail.com</a><br class="">503 King Farm Blvd #101<span class="Apple-tab-span" style="white-space: pre;"> </span><br class="">Rockville, MD 20850-6667<span class="Apple-tab-span" style="white-space: pre;"> </span>Mobile (413)-427-5334<br class=""><br class=""></div>
</div>
<br class=""></div></div></blockquote></div><br class=""><div class="">
<div style="color: rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">---<br class="">Murray Eisenberg<span class="Apple-tab-span" style="white-space: pre;"> </span><a href="mailto:murrayeisenberg@gmail.com" class="">murrayeisenberg@gmail.com</a><br class="">503 King Farm Blvd #101<span class="Apple-tab-span" style="white-space: pre;"> </span><br class="">Rockville, MD 20850-6667<span class="Apple-tab-span" style="white-space: pre;"> </span>Mobile (413)-427-5334<br class=""><br class=""></div>
</div>
<br class=""></div></body></html>