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From: Henning Hraban Ramm <angerweit@gmx.net>
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Subject: Re: Calculated Header Text
Date: Tue, 23 Jul 2002 22:50:56 +0200
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Am Montag, 22. Juli 2002 21:46 schrieb Hans Hagen:
> That is strange. How does your (minimal) file looks? Are you sure that the
> tuo file is produced?

The .tuo *is* produced and looks ok.
Your commands work in the body, but not in the header -- then I get the 
following error:
systems        : begin file minimal at line 1
! Use of \MNam:f:1 doesn't match its definition.
<argument> \GetFirstOnPage {MNam}\relax
                                        {}{}{}{}{}
\firstoftwoarguments #1#2->#1

---------------
% Ok, it's not completely minimal...
\starttext

\enableregime		[windows]
\mainlanguage		[de]
\setupencoding		[default=texnansi]
\setupbodyfont		[7pt]

\definepapersize	[filius][width=92mm, height=172mm]
\setuppapersize		[filius][A4,landscape]
%\setuparranging		[2SIDE]
\setuplayout		[location=middle,
			alternative=singlesided,
			grid=no, marking=on,
			leftmargin=10mm, leftmargindistance=0mm,
			topspace=2mm, header=4mm, footer=0mm,
			width=77mm, height=166mm]

\def\RegisterPageMark#1#2% #1=Class #2=Text
	{\iftrialtypesetting \else
	\doglobal\increment\MNamCounter%
	\textreference[#1:t:\MNamCounter]{#2}%
	\doifreferencefoundelse{#1:t:\MNamCounter}
	{\doifundefined{#1:f:\currentrealreference}%
	{\setxvalue{#1:f:\currentrealreference}
	{\noexpand\in[#1:t:\MNamCounter]}}
	\setxvalue{#1:l:\currentrealreference}%
	{\noexpand\in[#1:t:\MNamCounter]}}%
	{}%
	\fi}

\def\GetFirstOnPage#1{\getvalue{#1:f:\realfolio}} % #1=Class
\def\GetLastOnPage#1{\getvalue{#1:l:\realfolio}} % #1=Class

% This makes the error:
\setupheadertexts	[{\GetFirstOnPage{MNam}}][{\GetLastOnPage{MNam}}]

\def\Name#1{\RegisterPageMark{MNam}{#1}\bf #1}

\def\TableLine#1{\NC\Name{#1}\NC geb\NC\NR\NC Strasse\NC Ort\NC 
Telefon\NC\NR\HL}

\starttabulate[|l|l|l|]
\HL
\TableLine{eins}
\TableLine{zwei}
\TableLine{drei}
\TableLine{vier}
\stoptabulate

% This works:
\GetFirstOnPage{MNam} -- \GetLastOnPage{MNam}

\stoptext
--------------------

Grüßlis vom Hraban!
--