Dear Taco and list, I have a problem (with the latest minimals) sorting bibtex entries: Consider the following example: % bibbug.tex \usemodule[bib] \setuppublications[ sorttype=bbl, ] \setupbibtex[ database=mp, ] \starttext See~\cite{resi3,resi4} and also~\cite{resi2,resi1}. \placepublications[criterium=all] \stoptext % end of bibbug.tex I get an eror: ! LuaTeX error ...TeXt/tex/texmf-context/tex/context/base/bibl-tra.lua:83: attempt to compare two nil values stack traceback: ...TeXt/tex/texmf-context/tex/context/base/bibl-tra.lua:83: in function <...TeXt/tex/texmf-context/tex/context/base/bibl-tra.lua:80> [C]: in function 'sort' ...TeXt/tex/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 ... l.14 \placepublications[criterium=all] If I uncomment the sorttype=bbl line, it compiles. Attached is the tex file, the log file, and my bib file. Best regards, Mikael