error running wiki example with labels

* error running wiki example with labels
@ 2020-06-24 19:05 Jan-Erik Hägglöf
  2020-06-24 19:24 ` Aditya Mahajan
                   ` (2 more replies)
  0 siblings, 3 replies; 10+ messages in thread
From: Jan-Erik Hägglöf @ 2020-06-24 19:05 UTC (permalink / raw)
  To: mailing list for ConTeXt users

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Hello All!

In the page https://wiki.contextgarden.net/Labels <https://wiki.contextgarden.net/Labels>

I’ve tried with no success to run those examples given at the page. The error complaint as the log shows below

return {
 ["filename"]="./labels3.tex",
 ["lastluaerror"]="function call [801]: ...-64/tex/texmf-context/tex/context/base/mkiv/node-syn.lua:435: attempt to index a nil value (upvalue 'filehandle')",
 ["lasttexerror"]="?",
 ["linenumber"]=70,
 ["luaerrorline"]="435",
 ["offset"]=10,
}

open source     > level 1, order 1, name 'cont-yes.mkiv'
system          > 
system          > ConTeXt  ver: 2020.03.10 14:52 MKIV beta  fmt: 2020.4.13  int: english/english
system          > 
system          > 'cont-new.mkiv' loaded
open source     > level 2, order 2, name '/Users/janneman/context-osx-64/tex/texmf-context/tex/context/base/mkiv/cont-new.mkiv'
system          > beware: some patches loaded from cont-new.mkiv
close source    > level 2, order 2, name '/Users/janneman/context-osx-64/tex/texmf-context/tex/context/base/mkiv/cont-new.mkiv'

system          > files > jobname 'labels3', input './labels3', result 'labels3'
fonts           > latin modern fonts are not preloaded
languages       > language 'en' is active
system          > synctex functionality is enabled, expect 5-10 pct runtime overhead!
open source     > level 2, order 3, name './labels3.tex'
open source     > level 3, order 4, name '/Users/janneman/context-osx-64/tex/texmf-context/tex/context/fonts/mkiv/type-imp-plex.mkiv'
open source     > level 4, order 5, name '/Users/janneman/context-osx-64/tex/texmf-context/tex/context/fonts/mkiv/type-imp-texgyre.mkiv'
close source    > level 4, order 5, name '/Users/janneman/context-osx-64/tex/texmf-context/tex/context/fonts/mkiv/type-imp-texgyre.mkiv'
close source    > level 3, order 5, name '/Users/janneman/context-osx-64/tex/texmf-context/tex/context/fonts/mkiv/type-imp-plex.mkiv'
fonts           > defining > font with asked name 'IBMPlexSans-regular' is not found using lookup 'file'
fonts           > defining > unknown font 'IBMPlexSans-regular', loading aborted
fonts           > defining > unable to define 'IBMPlexSans-regular' as 'ibmplex-11pt-ss-tf-0--0'
open source     > level 3, order 6, name '/Users/janneman/context-osx-64/tex/texmf-context/tex/context/base/mkiv/meta-imp-dum.mkiv'
close source    > level 3, order 6, name '/Users/janneman/context-osx-64/tex/texmf-context/tex/context/base/mkiv/meta-imp-dum.mkiv'
metapost        > library 'dum' is loaded
metapost        > initializing instance 'metafun:1' using format 'metafun' and method 'default'
metapost        > loading 'metafun' as '/Users/janneman/context-osx-64/tex/texmf-context/metapost/context/base/mpiv/metafun.mpxl' using method 'default'
metapost        > initializing number mode 'scaled'
metapost log    > 
metapost log    > loading metafun, including plain.mp version 1.004 for metafun iv and xl
metapost log    > 
fonts           > bodyfont '14pt' is defined (can better be done global)
fonts           > bodyfont '16.8pt' is defined (can better be done global)
fonts           > bodyfont '11.2pt' is defined (can better be done global)
fonts           > defining > font with asked name 'IBMPlexSans-regular' is not found using lookup 'file'
fonts           > defining > unknown font 'IBMPlexSans-regular', loading aborted
fonts           > defining > unable to define 'IBMPlexSans-regular' as 'ibmplex-14pt-ss-tf-0--0'

lua error       > lua error on line 70 in file ./labels3.tex:

function call [801]: ...-64/tex/texmf-context/tex/context/base/mkiv/node-syn.lua:435: attempt to index a nil value (upvalue 'filehandle')

60     \setlayer[BG][
61       preset=leftbottom,
62       hoffset=5mm,
63       voffset=3mm]{%
64       the context group}
65     
66     \starttext
67     \startlines
68     \Name{Hans Hägar}
69     \Title{CEO · R&D}
70 >>  \page
71     
72     \Name{Wolf Schmidt}
73     \Title{0th Level Support}
74     \page
75     
76     \Name{Mocca Bob}
77     \Title{the Builder}
78     \page
79     
80     \Name{A. Rockefeller}

It seems to complain with the \page command

Jan-Eriks-Air: ~/Google Drive/PRIVAT janneman > context --version
mtx-context     | ConTeXt Process Management 1.03
mtx-context     |
mtx-context     | main context file: /Users/janneman/context-osx-64/tex/texmf-context/tex/context/base/mkiv/context.mkiv
mtx-context     | current version: 2019.07.24 11:31
mtx-context     | main context file: /Users/janneman/context-osx-64/tex/texmf-context/tex/context/base/mkiv/context.mkxl
mtx-context     | current version: 2020.03.10 14:52

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