You will need to add the following macro to the example file ibar-bib.tex. Once the expansion bug is fixed the file will compile. \def\h#1{{\oalign{\relax#1\crcr\hidewidth\SHIFT{34}% \vbox to.2ex{\hbox{\char'25}\vss}\hidewidth}}} Best Idris =============================================== =============================================== Dear Taco, There is some esoteric macro expansion bug in the bib module (beyond my capability to understand). For example, the \Ibar macro works fine outside of the a= context. \getcommacommandsize can't seem to figure out that ## stands for an alignment preamble. Is there a way to protect the argument of a= ? Please try the following : ================ibar-bib.bbl==================== \startpublication[k=amini93, t=book, a=al-Am\={i}n\~i, y=1993, s=] \author[]{Mu\.hammad H\=ad\=i}[]{}{Al-Am\=in\=i} \title{Mu\`allimu \~a\~l-\v S\=i\`ah: a~l-\v Say\h h al-Muf\=id} %\pubname{} \city{Beirut} \pubyear{{1993}} \stoppublication =========================================== ================ibar-bib.tex==================== % output=pdf interface=en \usemodule[bib] \def\SHIFT#1{\dimen0=.00#1ex \multiply\dimen0 by\fontdimen1\font \kern-.0156\dimen0} % compensate for slant/italic in lower accents \def\USHIFT#1{\dimen0=.00#1ex \multiply\dimen0 by\fontdimen1\font \kern.0156\dimen0} % compensate for slant/italic in upper accents \def\IBAR% {\leavevmode\vbox{\offinterlineskip\lineskip0.295ex% \ialign{##\cr\USHIFT{120}\hfill\hbox to .21243em{\leaders\hrule height .07ex\hfill}\hfill\SHIFT{1}\cr\i\cr}}} \definecharacter imacron {\IBAR} % ConTeXt-dependent! \setupwhitespace[big] \starttext \cite[amini93] M\=irz\=a \section{References}{\tfx\setupinterlinespace {\leavevmode\placepublications}} \stoptext =========================================== I get the following error =========================================== systems : begin file ibar-bib at line 20 ! Illegal parameter number in definition of \commacommand. <to be read again> \cr \IBAR ...lineskip \lineskip 0.295ex\ialign {##\cr \USHIFT {120}\hfill \hbox .. \dohandleaccent ... #1\string #2\empty \endcsname \else \ifcsname \accentpre... \thebibauthors ->{al-Am\={i} n\~i} \getcommacommandsize [#1]->\edef \commacommand {#1 }\scratchtoks \expandafter... \dobibauthoryear ...acommandsize [\thebibauthors ] \@EA \processcommalist \@E... .. =========================================== Please advise-) Best Idris ============================ Professor Idris Samawi Hamid Department of Philosophy Colorado State University Fort Collins, CO 80523 _______________________________________________ ntg-context mailing list ntg-context@ntg.nl http://www.ntg.nl/mailman/listinfo/ntg-context ============================ Professor Idris Samawi Hamid Department of Philosophy Colorado State University Fort Collins, CO 80523