On 2017-08-18 17:34, Fabrice Couvreur wrote:
> Hello,
> It's ok for me if I compile the Aditya file.
> I have another problem with a simple structure. I created the file 
> MyLayout.tex containing the macro and I want to call this macro in the 
> dm1.tex file, but it does not work.
> Thank you
> Fabrice
>
> #########
> MyLayout.tex
> #########
>
> % macros=mkvi
>
> \startenvironment MyLayout
>
> \setuplayout
>    [header=3\lineheight,
>     headerdistance=\lineheight]
>
> \setupbackgrounds
>   [header]
>   [text]
>   [
>     frame=off,
>     bottomframe=on,
>     framecolor=darkgray,
>     rulethickness=2pt,
>   ]
>
> \defineframed[headerframed]
>              [
>                frame=off, % For visualization set this to on
>                height=fit,
>                width=fit,
>                location=bottom,
>                boffset=\lineheight,
>              ]
>
> \starttexdefinition MyHeader #where #day #month #year #title #number #time
>
>     \setupheadertexts
>       [{\headerframed[align=middle, foregroundstyle=bold, 
> foregroundcolor=red]
>             {#title n\high{o}\,#number}}]
>
>     \setupheadertexts
>       [{\headerframed[align=flushleft, foregroundstyle=\ssx]
>           {Lycée JANSON DE SAILLY \\ \date[d=#day,m=#month,y=#year]}}]
>       [{\headerframed[align=flushright, foregroundstyle=\ssx]
>           {#where \\ {#time}}}]
>
> \stoptexdefinition
>
> \stopenvironment
>
> ######
> dm-1.tex
> ######
>
> \startcomponent dm-1
>
>   \environment MyLayout
>
>   \MyHeader{Seconde}{17}{08}{2017}{Devoir surveillé}{1}{1h\,30m}
>
>   \input knuth
>
> \stopcomponent
>
> 2017-08-18 18:44 GMT+02:00 Otared Kavian <otared@gmail.com 
> <mailto:otared@gmail.com>>:
>
>     Hi Aditya,
>
>     Thanks for having sent the example file: indeed with your file I
>     can typeset the example and see the expected result.
>     I don’t know what happened when I copied and pasted the example
>     from the e-mail…
>     I think the command
>             % macros = mkvi
>     was not set correctly written at the first line, that is I had a
>     space before the percent sign « % ». In fact
>             %macros=mkvi
>     or
>             %macros = mkvi
>     work as well.
>
>     By the way, wouldn’t be more user friendly, and more in the spirit
>     of ConTeXt, if we had a command saying
>             \enablemode[mkvi]
>     in order to tell ConTeXt that we are using %macros = mkvi ?
>
>     Best regards: OK
>
>     > On 18 Aug 2017, at 17:54, Aditya Mahajan <adityam@umich.edu
>     <mailto:adityam@umich.edu>> wrote:
>     >
>     > On Fri, 18 Aug 2017, Otared Kavian wrote:
>     >
>     >> Hi Aditya,
>     >>
>     >> I tried to typeset your example, but got an error: whether or
>     not the command
>     >>      % macros=mkvi
>     >> is present on the fist line, then ConTeXt complains saying that
>     >>      ! Illegal parameter number in definition of \MyHeader
>     >> and stops typesetting pointing to the command \stoptexdefinition.
>     >
>     > I am attaching the file. It runs fine here with ConTeXt  ver:
>     2017.08.14 23 <tel:2017.08.14%2023>:57.
>     >
>     > Aditya<frame.tex>
>

I believe you need to declare the use of MKVI macros as the first thing 
in your project file if they will be used by any components.

-- 
Rik