Hello Hans, The following minimal example stopped working recently (in "current" ConTeXt it still compiles fine).
\startformula \bigm|_a \stopformula systems: begin file paren at line 1 ! Missing number, treated as zero. <to be read again> $ \@@dobig ...o #1\bodyfontsize {}\right ....@space $ }} \...@mt@defaultbigm #1->\puremathcomm {rel}{\big {#1} } l.3 \bigm| _a. ? Mojca ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : https://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________