Hi, Since I have also suffered somewhat from the cryptic (and often useless…) error messages, I understand your frustration :-) Now, maybe if you do context --directives="system.showerror" myfile.tex then you get a file named « myfile-status.html » which is more helpful. Best regards: OK

On 14 Dec 2019, at 17:57, Rudolf Bahr wrote:

On Sat, Dec 14, 2019 at 05:43:45PM +0100, Bahr Rudolf wrote:

...

Hello All,

In: LuaMetaTeX, Version 2.03.3 ConTeXt ver: 2019.12.12 19:35 MKIV beta fmt: 2019.12.12 int: english/english I get the following error message:

tex error > error not related to input file: tex error > tex: ! Emergency stop tex error > lua: ? tex error > mps: -

Sorry, no MWE available. What does this message mean? [1] shows only an empty page. To this point my programm does all what it should with the exception of creating a grey pdf-file-page. My pdf-programs are okular and xpdf.

In: LuaTeX, Version 1.11.2 (TeX Live 2020/dev) ConTeXt ver: 2019.12.12 19:23 MKIV beta fmt: 2019.12.13 int: english/english I get a "*" instead of the error message above. And again my program does all what it should, but a grey pdf-page too.

Shure, there must be an error in my program. But where should I look for it? I tried several MWEs, but they all worked at their best.

Please, any ideas?

Best wishes, Rudolf

[1] https://wiki.contextgarden.net/error_not_related_to_input_file

Sorry, I forgot: My program uses up to now mainly \startluacode ... \stopluacode.

Rudolf ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki!

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On Sat, Dec 14, 2019 at 10:31:20PM +0100, Hans Hagen wrote:

On 12/14/2019 5:43 PM, Rudolf Bahr wrote:

...

Hello All,

In: LuaMetaTeX, Version 2.03.3 ConTeXt ver: 2019.12.12 19:35 MKIV beta fmt: 2019.12.12 int: english/english I get the following error message:

tex error > error not related to input file: tex error > tex: ! Emergency stop tex error > lua: ? tex error > mps: -

In LuaTeX ... I get a "*" instead of the error message above. And again my program does all what it should, but a grey pdf-page too.

Sorry, no MWE available.

On Sat, Dec 14, 2019 at 07:27:34PM +0100, Otared Kavian wrote:

Since I have also suffered somewhat from the cryptic (and often useless…) error messages, I understand your frustration :-) Now, maybe if you do context --directives="system.showerror" myfile.tex then you get a file named « myfile-status.html » which is more helpful.

On Sat, Dec 14, 2019 at 10:31:20PM +0100, Hans Hagen wrote:

normally an * means: waiting for input .... and no message is then involved as in principle there is no real error, apart from waiting for input

Otared and Hans, thank you for your answers and Otared especially for your sympathy! :-) In the meantime I could get rid of "! Emergency stop" and "*" by changing a \def-command which calls a luacode subprogram; see further down in my MWE. My program run now looks essentially better, but "--directives="system.showerror" and "<my program>-status.html" still report an error: "! Undefined control sequence" without telling which control sequence is undefined. How reliable is this error message? I don't know of control sequences in luacode or what does this error message mean? Here is a MWE which shows my program structure. Sorry, this MWE works really :-) During my attempts to find the error I got for a short time the message: "Invalid \starttext ... \stoptext structure" which I don't understand. --------------------------------------------------- MWE ------------------------------- \def\projectpath{/home/sam/trip-2019/} \startluacode userdata = userdata or {} u = userdata function u.table_save ( tab, file ) local tab = tab local file = file dofile ("table_save_u_table_load.lua") table.save(tab, file) end function u.Init ( col ) local col = col local ppth = tokens.getters.macro("projectpath") local xO = tokens.getters.macro("xO") local yO = tokens.getters.macro("yO") local I = {} -- Table of initial values I ["projectpath"] = ppth I ["column"] = {} I ["column"][col] = {} I ["column"][col]["layerpos"] = {} I ["column"][col]["layerpos"] ["xO"] = xO I ["column"][col]["layerpos"] ["yO"] = yO u.table_save(I,"I-Table.lua") end \stopluacode %\def\Init #1 {\ctxlua {u.Init ([==[#1]==]) }}% --the blanks produced my "! Emergency stop" \def\Init#1{\ctxlua{u.Init([==[#1]==])}}% --in this form the command works \starttext \def\Column{A}% \def\xO{0}% in pt \def\yO{20}% in pt \Init{\Column}%% \stoptext --------------------------------------------------------------------------------------- For those possibly interested in running this MWE I append "table_save_u_table_load.lua", a lua program to save and reload lua tables, found in the lua homepage. Anyway, the resulting flattened table "I" is here: return { -- Table: {1} { ["column"]={2}, ["projectpath"]="/home/sam/trip-2019/", }, -- Table: {2} { ["A"]={3}, }, -- Table: {3} { ["layerpos"]={4}, }, -- Table: {4} { ["yO"]="20", ["xO"]="0", }, } I think nobody will be able to help me in this case, I myself have to try again and again to finally find the error. If so, this would be the nicest christmas gift to me :-) Best regards, Rudolf