Actually the issue was discussed some time ago and Wolfgang Schuster explained that.
In fact after sending you the previous answer I realized that he explained also that the right way is to use \defineconversionset and then reset the userpagenumber when necessary: look at the following example:

%%%% begin example
\defineconversionset[frontpart:pagenumber][][romannumerals]
\defineconversionset[bodypart:pagenumber] [][numbers]
\defineconversionset[backpart:pagenumber] [][characters]

\starttext
\startfrontmatter
\input knuth.tex
\stopfrontmatter

\startbodymatter
\setupuserpagenumber[number=1]
\input ward.tex
\stopbodymatter

\startbackmatter
\setupuserpagenumber[number=1]
\input tufte.tex
\stopbackmatter
\stoptext
%%%% end example

It would be nice to wikify things each time one learns something…

Best regards: OK

On 22 May 2014, at 12:24, Werner Hintze <we.hintze@gmail.com> wrote:

Thank you! This works.

But tell me: How do you know this? The manual and the website don’t explain it this way…

Best regards

Werner

On 22 May 2014, at 12:16, Otared Kavian wrote:

Hi,

In fact you should use
\setupuserpagenumber[number=1]
as in the following example:

%%%% begin example
\starttext
\startfrontmatter
\setupuserpagenumber[numberconversion=Romannumerals]
\input knuth.tex
\stopfrontmatter

\startbodymatter
\setupuserpagenumber[numberconversion=numbers]
\setupuserpagenumber[number=1]
\input ward.tex
\stopbodymatter
\stoptext
%%%% end example

Best regards: OK

On 22 May 2014, at 11:37, Werner Hintze we.hintze@gmail.com wrote:

I don’t unterstand \startfrontmatter, \starbodymatter etc.

I thought, the frontmatter has roman numerals, the bodymatter normal and so on. This is not automatically so. Now founf how to make this, bus the problem is: I can’t reset the page number. I believed, it shoul work like this:

\startfrontmatter
\setupuserpagenumber[numberconversion=Romannumerals]
% some stuff
\stopfrontmatter

\startbodymatter
\setupuserpagenumber[numberconversion=numbers]
\setnumber[page]{1}
%some stuff
\stopbodymatter
This doesn’t work, may be because \setnumber is not a command in ConTeXt?

Where is my error?

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

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage : http://www.pragma-ade.nl / http://tex.aanhet.net
archive : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net

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

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage : http://www.pragma-ade.nl / http://tex.aanhet.net
archive : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net

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

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________