! LuaTeX error ...t-04/tex/texmf-context/tex/context/base/grph-inc.lua:221: bad argument #1 to 'match' (string expected, got nil) stack traceback: [C]: in function 'match' ...t-04/tex/texmf-context/tex/context/base/grph-inc.lua:221: in function 'guess' ...t-04/tex/texmf-context/tex/context/base/grph-inc.lua:1145: in function <...t-04/tex/texmf-context/tex/context/base/grph-inc.lua:1143> (tail call): ? ...t-04/tex/texmf-context/tex/context/base/grph-inc.lua:767: in function 'locate' ...t-04/tex/texmf-context/tex/context/base/grph-inc.lua:844: in function 'identifier' ...t-04/tex/texmf-context/tex/context/base/grph-inc.lua:862: in function 'identify' <main ctx instance>:1: in main chunk. The version used is: ConTeXt ver: 2012.10.06 15:31 MKIV fmt: 2012.10.13 int: english/english Is there a quick fix, or I get stuck at a bad moment. Thanks in advance. Hans van der Meer