Hi Hans, more serious: today's beta doesn't process my xml files. Too late today for a minimal example; maybe the error can give a clue: systems : end file vorlesung-mkiv at line 1 systems : begin file historiker at line 1 ! LuaTeX error no string to print stack traceback: [C]: in function 'texsprint' ...text/tex/texmf-context/tex/context/base/lxml-ent.lua:47: in function <...text/tex/texmf-context/tex/context/base/lxml-ent.lua:37> [C]: in function 'match' ...text/tex/texmf-context/tex/context/base/lxml-tex.lua:498: in function '@tx@' ...text/tex/texmf-context/tex/context/base/lxml-tab.lua:751: in function '@dc@' ...text/tex/texmf-context/tex/context/base/lxml-tab.lua:774: in function 'xmlserialize' ...text/tex/texmf-context/tex/context/base/lxml-tex.lua:545: in function 'xmlsprint' ...text/tex/texmf-context/tex/context/base/lxml-tex.lua:1207: in function 'flush' <main ctx instance>:1: in main chunk. \xmlflush #1->\ctxlua {lxml.flush("#1")} \dostructurecomponent ...uctureparameter \c!title }\xdef \currentstructurebo... \doregisterstructurehead ... \c!command =, #2][#3] \reportcurrentstructure \dohandlestructurehead ...ructurehead {#1}{#2}{#3} \let \getstructureheadsync... l.8 } \xmlflush #1->\ctxlua {lxml.flush("#1")} ... l.2 \xmlprocess{\xmldocument}{./historiker.xml}{} ? ^\/Users/tas/context/tex/texmf-osx-intel/bin/context: line 2: 3064 Same file with same environment processed without problems by version: 2009.10.02 13:14 Thank goodness I still have an older version around... All best Thomas