Dear list, I have the following sample: \starttext \null \stoptext Trying to compile it with "context --luatex", I get the error message copied bellow. Could anyone confirm that the format file for MkIV (LuaTeX) cannot be generated with current latest (from today [2023.03.06 14:48])? Many thanks for your help, Pablo lua error > lua error on line 21 in file ~/context/tex/texmf-context/tex/context/base/mkiv/back-pdf.mkiv: ...ext/tex/texmf-context/tex/context/base/mkiv/lpdf-nod.lua:72: creating a whatsit requires the subtype number as a second argument stack traceback: [C]: in local 'new_node' ...ext/tex/texmf-context/tex/context/base/mkiv/lpdf-nod.lua:72: in local 'code' ...ext/tex/texmf-context/tex/context/base/mkiv/util-lua.lua:96: in field 'loadedluacode' ...ext/tex/texmf-context/tex/context/base/mkiv/luat-env.lua:108: in field 'luafilechunk' ...ext/tex/texmf-context/tex/context/base/mkiv/luat-cod.lua:73: in function 'lua.registercode' [ctxlua]:1: in main chunk 11 %C therefore copyrighted by \PRAGMA. See mreadme.pdf for 12 %C details. 13 14 %D The less there is here, the better. After a decade it is time to remove the \type 15 %D {\pdf*} ones completely. For the moment I keep them commented but even that will 16 %D go away. 17 18 \writestatus{loading}{ConTeXt Backend Macros / PDF} 19 20 \registerctxluafile{lpdf-ini}{optimize} 21 >> \registerctxluafile{lpdf-nod}{} 22 \registerctxluafile{lpdf-eng}{optimize} 23 \registerctxluafile{lpdf-col}{} 24 \registerctxluafile{lpdf-vfc}{} 25 \registerctxluafile{lpdf-xmp}{} 26 \registerctxluafile{lpdf-ano}{} 27 \registerctxluafile{lpdf-res}{} 28 \registerctxluafile{lpdf-mis}{} 29 \registerctxluafile{lpdf-ren}{} 30 \registerctxluafile{lpdf-grp}{} 31 \registerctxluafile{lpdf-wid}{} resolvers | formats | resolvers | formats | binary path : ~/context/tex/texmf-linux-64/bin resolvers | formats | format path : ~/context/tex/texmf-cache/luatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/formats/luatex resolvers | formats | luatex engine : luatex resolvers | formats | lua startup file : ~/context/tex/texmf-context/tex/context/base/mkiv/luat-cod.lua resolvers | formats | context file : ~/context/tex/texmf-context/tex/context/base/mkiv/cont-en.mkiv resolvers | formats | run time : 1.497 seconds resolvers | formats | return value : error resolvers | formats | mtx-context | error, no format found with name: cont-en, aborting