Hi, donno if this is a bug or a feature. If I use \blank with a dimen register, I get [..] context/base/type-otf.tex (r:/tex/texmf-context/tex/context/base/type-otf.mkiv)) bodyfont : 12pt rm is loaded language : language en is active systems : begin file test at line 4 ! Missing number, treated as zero. <to be read again> F <argument> F OO \addaskedblankskip ...nce \blankskip #1\dimexpr #2 \relax l.10 } \dovspacingyes ...ument #1\else \s!default \fi ")} \fi l.6 \blank[force,\FOO] ? Here is a minimal example: %----------------- \newdimen\FOO \FOO5cm\relax \starttext \blank[force,\FOO] \stoptext %----------------- Using \blank[force,\the\FOO] does work. No such problems in mkii. MTXrun | current version: 2009.10.22 23:27 This is LuaTeX, Version beta-0.44.0-2009102313 Greetings, Peter