Hello Wolfgang, with the latest beta I get a problem with your letter module. If this error message is not enough, I can investigate further later today. This is LuaTeX, Version beta-0.70.1-2011051908 (rev 4277) \write18 enabled. ConTeXt ver: 2011.09.18 22:35 MKIV fmt: 2011.9.19 int: english/ english ... resolvers > modules > loaded: 'letter' (/Users/hraban/Library/texmf/tex/texmf-modules/tex/context/third/ letter/base/t-letter.tex loading > Context User Module / Framework for Letters resolvers > modules > loaded: 'correspondence' (/Users/hraban/Library/texmf/tex/texmf-modules/tex/context/third/ letter/base/t-correspondence.mkiv loading > Context User Module / Correspondence ) ! Undefined control sequence. system > tex > error on line 272 in file invoicesetup.tex: Undefined control sequence ... \dodododosetupcorrespondencelayer ...sname \@EAEA \csname dosetupcorresponde... \next5 #1,->\dodododosetupcorrespondencelayer {#1} \do_process_comma_item \do_process_comma_list ...m \gobbleoneargument #1, ]\relax \global \advance \... \next4 #1,->\dododosetupcorrespondencelayer {#1} \do_process_comma_item \do_process_comma_list ...m \gobbleoneargument #1, ]\relax \global \advance \... \dododefinecorrespondencelayer ...in =\zeropoint ] \dodosetupcorrespondencela... ... l.272 \dodefineletterlayer[\v!header] ? (My file invoicesetup.tex has only about 150 lines, so...) Greetlings from Lake Constance! Hraban --- http://www.fiee.net/texnique/ http://wiki.contextgarden.net https://www.cacert.org (I'm an assurer)