On 4/24/2013 5:30 PM, Lars Huttar wrote:
Hello,
I'm encountering the following error, under ConTeXt ver: 2012.05.30
11:26 MKIV fmt: 2013.3.11 int: english/english:
system > tex > error on line 27 in file
data/three-volume-book-book-1.tex: terminal: >> NOfTextColumns-1
! Improper final value has been replaced by 0.
<to be read again>
:
<*> for i=1 upto NOfTextColumns-1:
draw (rightboundary TextColumns[i])
shif...
...
17 \safeinput ./data/statistics-for-area-area-africa.tex
18 \safeinput ./data/statistics-for-area-area-europe.tex
19
20
21
22 \input ./macros/E16pagenohead.tex
23 \ifodd \pageno \else \noheaderandfooterlines \null \page[yes]\fi
\noheade
randfooterlines
24
25 \startptp{
26 \pagereference[Languages]\pnum{Part II}\ptitle{Language Listings}
27 >> }\stopptp
This error is very odd because:
a) The only place I can find code mentioning "NOfTextColumns-1" is in
mp-core.mpii, where it's commented out!
% \startuseMPgraphic{whatever}
% for i=1 upto NOfTextColumns-1 :
% draw (rightboundary TextColumns[i]) shifted ...
But maybe I just haven't been looking in the right places.
b) The place in my .tex document where the error occurs, line 27, is at
a \stopptp. Yet there is an essentially identical start/stopptp earlier
in the document, where no such error is thrown:
\startptp{
\pagereference[Summaries]\pnum{Part I}\ptitle{Statistical Summaries}
}\stopptp
So I guess there's some content in between the two starts/stop ptp's
that's laying the stage for the error to occur.
I'll be working on a minimal example, but that's time-consuming; and I
thought in the meantime, there may be some clues in the above
information that could help clarify the nature of the problem, to
someone who understands the inner workings of ConTeXt.
It took me a while to figure it out as NOfTextColumns is only used in
very special cases and long gone from context (it dates from a previous
background implementation). Normally the obsolete code is never seen but
in your case consulting the variable might be triggered by the fact that
multi_column_first_page_hack
is set to true (looks like a quick hack i made for Jelle long ago).
I commented it in the mkii source now, hopefully no error message any
longer.
Hans
ps. sometimes there is some specific test code that then depends on
other experimental code being present
ps. in mkiv it's all redone anyway and i will redo columnsets one of
these days too;
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Hans Hagen | PRAGMA ADE
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| www.pragma-pod.nl
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