On 5 Dec 2017, at 16:41, Jan U. Hasecke wrote:

contextgarden is full of letter examples. But even the first simple example here http://wiki.contextgarden.net/Letter#Example does not compile.

same here: mtx-context | run 1: luatex --fmt="/Applications/ConTeXt/tex/texmf-cache/luatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/formats/luatex/cont-en" --jobname="test" --lua="/Applications/ConTeXt/tex/texmf-cache/luatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/formats/luatex/cont-en.lui" --no-parse-first-line --c:currentrun=1 --c:fulljobname="/Users/vm/Desktop/tex/test.tex" --c:input="/Users/vm/Desktop/tex/test.tex" --c:kindofrun=1 --c:maxnofruns=9 "cont-yes.mkiv" This is LuaTeX, Version 1.05.0 (TeX Live 2017) system commands enabled. open source > level 1, order 1, name '/Applications/ConTeXt/tex/texmf-context/tex/context/base/mkiv/cont-yes.mkiv' system > system > ConTeXt ver: 2017.11.01 15:58 MKIV beta fmt: 2017.11.8 int: english/english system > system > 'cont-new.mkiv' loaded open source > level 2, order 2, name '/Applications/ConTeXt/tex/texmf-context/tex/context/base/mkiv/cont-new.mkiv' close source > level 2, order 2, name '/Applications/ConTeXt/tex/texmf-context/tex/context/base/mkiv/cont-new.mkiv' system > files > jobname 'test', input '/Users/vm/Desktop/tex/test', result 'test' fonts > latin modern fonts are not preloaded languages > language 'en' is active open source > level 2, order 3, name '/Users/vm/Desktop/tex/test.tex' modules > 'letter' is loaded open source > level 3, order 4, name '/Applications/ConTeXt/tex/texmf-modules/tex/context/third/letter/base/s-cor-01.mkvi' modules > 'cor-00' is loaded open source > level 4, order 5, name '/Applications/ConTeXt/tex/texmf-modules/tex/context/third/letter/base/s-cor-00.mkvi' lua error > lua error on line 30 in file /Applications/ConTeXt/tex/texmf-modules/tex/context/third/letter/base/s-cor-00.mkvi: ...eXt/tex/texmf-context/tex/context/base/mkiv/luat-cod.lua:47: bad argument #1 to 'gmatch' (string expected, got nil) stack traceback: [C]: in function 'gmatch' ...eXt/tex/texmf-context/tex/context/base/mkiv/luat-cod.lua:47: in function 'registercode' [ctxlua]:1: in main chunk 20 %C MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 %C GNU General Public License for more details. 22 %C 23 %C You should have received a copy of the GNU General Public License 24 %C along with this program. If not, see http://www.gnu.org/licenses/. 25 26 \unprotect 27 28 % Lua functions for the core and also for the frontend modules 29 30 >> \ctxloadluafile{s-cor-00} 31 32 % Constants and variables 33 34 \startinterface all 35 \setinterfaceconstant {whitespace} {whitespace} 36 \setinterfaceconstant {backgroundimage} {backgroundimage} 37 \setinterfaceconstant {fromname} {fromname} 38 \setinterfaceconstant {fromaddress} {fromaddress} 39 \setinterfaceconstant {attention} {attention} 40 \setinterfaceconstant {subject} {subject} ? lua error > lua error on line 30 in file /Applications/ConTeXt/tex/texmf-modules/tex/context/third/letter/base/s-cor-00.mkvi: ...eXt/tex/texmf-context/tex/context/base/mkiv/luat-cod.lua:47: bad argument #1 to 'gmatch' (string expected, got nil) stack traceback: [C]: in function 'gmatch' ...eXt/tex/texmf-context/tex/context/base/mkiv/luat-cod.lua:47: in function 'registercode' [ctxlua]:1: in main chunk 20 %C MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 %C GNU General Public License for more details. 22 %C 23 %C You should have received a copy of the GNU General Public License 24 %C along with this program. If not, see http://www.gnu.org/licenses/. 25 26 \unprotect 27 28 % Lua functions for the core and also for the frontend modules 29 30 >> \ctxloadluafile{s-cor-00} 31 32 % Constants and variables 33 34 \startinterface all 35 \setinterfaceconstant {whitespace} {whitespace} 36 \setinterfaceconstant {backgroundimage} {backgroundimage} 37 \setinterfaceconstant {fromname} {fromname} 38 \setinterfaceconstant {fromaddress} {fromaddress} 39 \setinterfaceconstant {attention} {attention} 40 \setinterfaceconstant {subject} {subject} mtx-context | fatal error: return code: 1