I'm trying to follow http://wiki.contextgarden.net/rsfs to get a script L in math mode (to denote Laplace Transform) but to no avail. I followed the code in the first section, but I get the following compilation error. Any help is appreciated. Troy --- context foo.tex MTXrun | run 1: luatex --fmt="/opt/context-minimals/tex/texmf-cache/luatex-cache/context/ccfefc91ec3ed68af1aeed1f470fef4d/formats/cont-en" --lua="/opt/context-minimals/tex/texmf-cache/luatex-cache/context/ccfefc91ec3ed68af1aeed1f470fef4d/formats/cont-en.lui" --backend=pdf "./foo.tex" This is LuaTeX, Version beta-0.52.0-2010031622 \write18 enabled. (/home/thenders/classes/2010/spring/ma304/foo.tex ConTeXt ver: 2010.03.30 18:56 MKIV fmt: 2010.3.31 int: english/english system : cont-new loaded (/opt/context-minimals/tex/texmf-context/tex/context/base/cont-new.tex systems : beware: some patches loaded from cont-new.tex (/opt/context-minimals/tex/texmf-context/tex/context/base/cont-new.mkiv)) system : cont-fil loaded (/opt/context-minimals/tex/texmf-context/tex/context/base/cont-fil.tex loading : ConTeXt File Synonyms ) system : cont-sys loaded (/opt/context-minimals/tex/texmf-local/tex/context/user/cont-sys.tex (/opt/context-minimals/tex/texmf-context/tex/context/base/type-def.mkiv) (/opt/context-minimals/tex/texmf-context/tex/context/base/type-lua.tex) (/opt/context-minimals/tex/texmf-context/tex/context/base/type-siz.tex (/opt/context-minimals/tex/texmf-context/tex/context/base/type-siz.mkiv)) (/opt/context-minimals/tex/texmf-context/tex/context/base/type-otf.tex (/opt/context-minimals/tex/texmf-context/tex/context/base/type-otf.mkiv))) system : foo.top loaded (foo.top) fonts : preloading latin modern fonts (/opt/context-minimals/tex/texmf-local/tex/context/luc/type-luc.tex){/opt/context-minimals/tex/texmf/fonts/map/dvips/lm/lm-math.map}{/opt/context-minimals/tex/texmf/fonts/map/dvips/lm/lm-rm.map} bodyfont : 12pt rm is loaded language : language en is active {/opt/context-minimals/tex/texmf-context/fonts/map/pdftex/context/mkiv-base.map} systems : begin file foo.tex at line 16 ! Undefined control sequence. \scr ->\fam \purefamily {scriptfamily} l.18 ${\scr ABCDEFGHIJKLMNOPQRSTUVWXYZ}$ ?