Hello,

I am preparing a document with a publication list generated from BibTeX but
I get the following error:

! LuaTeX error .../context/texmf-context/tex/context/base/bibl-tra.lua:83:
attempt to compare nil with number
stack traceback:
.../context/texmf-context/tex/context/base/bibl-tra.lua:83: in function
<.../context/texmf-context/tex/context/base/bibl-tra.lua:80>
 [C]: in function 'sort'
.../context/texmf-context/tex/context/base/bibl-tra.lua:93: in function
'flush'
 <main ctx instance>:1: in main chunk.
\typesetpubslist ...hacks.flush("\@@pbsorttype ")}
                                                  \doendoflist
\dodoplacepublications ...sttrue \typesetpubslist
                                                  \inpublistfalse \endgroup
...
<to be read again>


Is there a way I can narrow down what and where the problem is? At the
moment I'm stumped.
I've tried removing some of the \cite commands recently added, but to no
avail. Is the problem in the BibTeX file or in
my document?

Any help would be much appreciated.

Regards,

Richard

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