Hello,<div><br></div><div>I am preparing a document with a publication list generated from BibTeX but I get the following error:</div><div><br></div><div><div>! LuaTeX error .../context/texmf-context/tex/context/base/bibl-tra.lua:83: attempt to compare nil with number</div>

<div>stack traceback:</div><div><span class="Apple-tab-span" style="white-space:pre">	</span>.../context/texmf-context/tex/context/base/bibl-tra.lua:83: in function &lt;.../context/texmf-context/tex/context/base/bibl-tra.lua:80&gt;</div>

<div><span class="Apple-tab-span" style="white-space:pre">	</span>[C]: in function &#39;sort&#39;</div><div><span class="Apple-tab-span" style="white-space:pre">	</span>.../context/texmf-context/tex/context/base/bibl-tra.lua:93: in function &#39;flush&#39;</div>

<div><span class="Apple-tab-span" style="white-space:pre">	</span>&lt;main ctx instance&gt;:1: in main chunk.</div><div>\typesetpubslist ...hacks.flush(&quot;\@@pbsorttype &quot;)}</div><div>                                                  \doendoflist </div>

<div>\dodoplacepublications ...sttrue \typesetpubslist </div><div>                                                  \inpublistfalse \endgroup ...</div><div>&lt;to be read again&gt;</div></div><div><br></div><div><br></div>

<div>Is there a way I can narrow down what and where the problem is? At the moment I&#39;m stumped.</div><div>I&#39;ve tried removing some of the \cite commands recently added, but to no avail. Is the problem in the BibTeX file or in</div>

<div>my document?</div><div><br></div><div>Any help would be much appreciated.</div><div><br></div><div>Regards,</div><div><br></div><div>Richard</div>

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