Stefan Wachter wrote:

thanks for the quick reply. I made the proposed changes but the error is still there. (I also run "texexec --make ..." and tried again.)

Do you have another idea that could solve the problem?

can you make a small example file? looks like some strange interference with _ being active (Normally not the case); is some module loaded? Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------

Hi Hans, I attach an example Context file and the included graphics. Unfortunately the example is by far not minimal. Can you look at the example anyway? If the length of the example causes problems then I may try to prune it. --Stefan Hans Hagen wrote:

Stefan Wachter wrote:

Could you make a minimal example that fails?

\starttext \externalfigure[x_x.png] \stoptext

works ok here, so there must be something else interfering

Hans

----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------

Patrick Gundlach wrote:

Stefan Wachter writes:

...

Hi Hans,

I attach an example Context file and the included graphics. Unfortunately the example is by far not minimal.

The file is just a few bytes, no need to mention...

Just looking at the error message, I bet your problem is at:

\setupheadertexts[text][{\tfc 8}{\tfb-3\_refkom}][] \setupheadertexts[margin][{\tfc bu}][\ifnum\pageno = 1\NamedExternalLink{../../../../bu/8/8_3_refkom/1/inhalt.pdf}{last}{\symbol[PfeilNachLinks]{} §}\else\PrevOrNextPage{/PrevPage}{\symbol[PfeilNachLinks]{} §}\fi\hskip.5em\ifnum\pageno = \lastpage{§ \symbol[PfeilNachRechts]}\else\PrevOrNextPage{/NextPage}{§ \symbol[PfeilNachRechts]}\fi]

Patrick Hi Patrick,

i do not think that the problem is caused by the header texts. The same header text definition is used during all the document but the problem is encountered only at a page with several external figures. In addition, if I insert a new page in between the figures then the problem disappears (cf. original bug report). --Stefan

Hi Patrick, you are right. If I change the header text such that there is no underbar in there then the error disappears. I prunned the example to investigate the situation further. Now I have only two pages. If you "texexec" the file then you get the error. If you uncomment the \page command at the end then the error disappears. BUT NOW THE SITUATION REALLY BECOMES STRANGE! If you delete all *.png files except the one that is included by the \externalfigure command then the error also disappears! It seems that the behaviour of Context is influenced by the content of the directory! --Stefan

Patrick Gundlach wrote:

minimum is far from 150 kb. And please avoid external figures if possible (there is cow.pdf hacker.jpg and mill.png for download, so we can all have the same figures to experiment with).

nice.. where are them? Maybe it'd be nice to have them in tex/context/sample

Hi Patrick, first I want to say that I already spent several hours on that problem and was happy to reduce the file size to 5215 Bytes. Of course I could have done further but I thought that the file is now handy enough for debugging. (I do not know how TeX code is debugged and what tools are available for that task.)

btw: with the error related to other files in the directory: did you run texutil --purgeall for testing?

Yes, I removed all temporary files. But the strange behaviour remains: when all images except that of the used external figure are removed then the error disappears. --Stefan Patrick Gundlach wrote:

Hello Stefan,

...

I prunned the example to investigate the situation further. Now I have only two pages.

Well, how do you think anybody should be able to debug what you have done with all the stuff in your document?

...

...

You should definitely try to reduce the file size to a minimum, otherwise it is hard to track the problem down.

minimum is far from 150 kb. And please avoid external figures if possible (there is cow.pdf hacker.jpg and mill.png for download, so we can all have the same figures to experiment with).

Please do your homework yourself next time:

-------------------------------------------------- \setupoutput[pdftex]

\usetypescript[adobekb][texnansi] \usetypescript[postscript][texnansi] \setupbodyfont[postscript,ss,13pt]

\setupheadertexts[text][\_][]

\starttext \dorecurse{10}{\input tufte \par}

\externalfigure[cow][scale=1424]

\externalfigure[cow][scale=1424]

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

Is the minimal test file I've come up with. Perhaps now it is easier for Hans to track down the problem. The error message is:

---------------------------------------- ! Missing $ inserted. <inserted text> $ <to be read again> _ \_...fmmode \mathunderscore \else \textunderscore \fi <argument> \_ {}{}{} \firstoftwoarguments #1#2->#1

\doattributes ...sname #1#2\@EA \endcsname \fi {#4 }\dostopattributes ... l.15

--------------------------------------------------

btw: with the error related to other files in the directory: did you run texutil --purgeall for testing?

Patrick

Patrick Gundlach wrote:

-------------------------------------------------- \setupoutput[pdftex]

\usetypescript[adobekb][texnansi] \usetypescript[postscript][texnansi] \setupbodyfont[postscript,ss,13pt]

\setupheadertexts[text][\_][]

\starttext \dorecurse{10}{\input tufte \par}

\externalfigure[cow][scale=1424]

\externalfigure[cow][scale=1424]

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

This file processes ok here; also, your bug is not so much related to headers but more to some kind of \_ expansion In what path are your graphics? Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------

Patrick Gundlach wrote:

Hello,

...

...

-------------------------------------------------- \setupoutput[pdftex]

\usetypescript[adobekb][texnansi] \usetypescript[postscript][texnansi] \setupbodyfont[postscript,ss,13pt]

\setupheadertexts[text][\_][]

\starttext \dorecurse{10}{\input tufte \par}

\externalfigure[cow][scale=1424]

\externalfigure[cow][scale=1424]

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

This file processes ok here; also, your bug is not so much related to headers but more to some kind of \_ expansion In what path are your graphics?

it breaks on 2004.8.14 as well on live.contextgarden.net

Graphics (cow.pdf) is in /opt/local/texmf/tex/context/sample

If the two graphics are not on the same page, the error dissapears. The reproduction of the error is very sensitive to layout changes.

the problem occurs in the output routine (when the page is built); some tracing all learns that while flushing the fig box takes place, the meaning of textunderscore is changed; so we need to restore this before hand; actually this problem should be solved differently, i.e. no redefinition at all; the problem is that findinf good solutions is not that easy because of "moments of expansion" fix (in core-fig.tex:) \def\dodoplaceexternalfigure[#1][#2][#3][#4][#5][#6]% {\doifsomething{#3}% catches \defineexternalfigure dummies {\bgroup \pushmacro\textunderscore \edef\textunderscore{\string_}% brrr, temp hack, still needed? \calculateexternalfigure[#1][#2][#3][#4][#5][#6]% \calculateexternalscreenfigure[#1][#2][#3][#4][#5][#6]% \popmacro\textunderscore \box\foundexternalfigure \egroup}} ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------

Hi Hans, thanks for your fix. It solves the problem. Will this fix be included in future Context releases? I am still confused why the content of the document directory had an impact on the output routine. (The problem disappeared after I had removed additional *.png files in the document directory. When I copied the superflous images into there again the problem reappeard.) I accept that computing in general and Context in special is kind of an empirical secret science. ;-) Thanks again, --Stefan

Stefan Wachter wrote:

thanks for your fix. It solves the problem. Will this fix be included in future Context releases?

it's in my source file so ... Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------

Hi Hans, thanks for the tip, --Stefan

why not use \goto[PreviousPage]{\symbol[...]} \goto[NextPage]{\symbol...]}

or \goto [forward]{\symbol[...] \goto [backward]{...}

etc (firstpage, lastpage, nextpage, previouspage, etc) Hans

Hi Hans, thanks for the additional hints. The width calculation method is very instructive. Yet, I think I can not use it, because I do not know in advance what kind of text is used as item labels. Maybe a label text contains already a comma. Is there another \processXXX-Makro for example \processampersandlist that can be used (because ampersands can not appear unescaped in normal text)? --Stefan PS: I found nowhere a description of \charwd

\def\determinecommalistwidth[#1]% {\scratchdimen\zeropoint \def\docommand##1% {\setbox\scratchbox\hbox{##1}% \ifdim\wd\scratchbox>\scratchdimen \scratchdimen\wd\scratchbox \fi}% \processcommalist[#1]\docommand}

\determinecommalistwidth[a),b),c)]

\the\scratchdimen

(or use \charwd cum suis)

it seems that metafun has difficulty understanding the example using the vardef self@# expr p = construct. ! Illegal parameter number in definition of \@MPG@dummy2. <to be read again> <argument> ... p of p enddef; \par vardef self@## expr p = cuta(@##,@##) @##... \dostartuseMPgraphic ...leuseMPgraphic {#1}{#2}{#3 }}\elabelgroup l.41 \stopuseMPgraphic why? i copied the sample of the mp manual: % interface=english output=pdftex \starttext \startuseMPgraphic{dummy2} vardef cuta(suffix a,b) expr p = drawarrow p cutbefore bpath.a cutafter bpath.b; point .5*length p of p enddef; vardef self@# expr p = cuta(@#,@#) @#.c{curl0}..@#.c+p..{curl0}@#.c enddef; beginfig(52); verbatimtex \def\stk#1#2{$\displaystyle{\matrix{#1\cr#2\cr}}$} etex circleit.aa(btex\strut Start etex); aa.dx=aa.dy; circleit.bb(btex \stk B{(a|b)^*a} etex); circleit.cc(btex \stk C{b^*} etex); circleit.dd(btex \stk D{(a|b)^*ab} etex); circleit.ee(btex\strut Stop etex); ee.dx=ee.dy; numeric hsep; bb.c-aa.c = dd.c-bb.c = ee.c-dd.c = (hsep,0); cc.c-bb.c = (0,.8hsep); xpart(ee.e - aa.w) = 3.8in; drawboxed(aa,bb,cc,dd,ee); label.ulft(btex$b$etex, cuta(aa,cc) aa.c{dir50}..cc.c); label.top(btex$b$etex, self.cc(0,30pt)); label.rt(btex$a$etex, cuta(cc,bb) cc.c..bb.c); label.top(btex$a$etex, cuta(aa,bb) aa.c..bb.c); label.llft(btex$a$etex, self.bb(-20pt,-35pt)); label.top(btex$b$etex, cuta(bb,dd) bb.c..dd.c); label.top(btex$b$etex, cuta(dd,ee) dd.c..ee.c); label.lrt(btex$a$etex, cuta(dd,bb) dd.c..{dir140}bb.c); label.bot(btex$a$etex, cuta(ee,bb) ee.c..tension1.3 ..{dir115}bb.c); label.urt(btex$b$etex, cuta(ee,cc) ee.c{(cc.c-ee.c)rotated-15}..cc.c); endfig; \stopuseMPgraphic \useMPgraphic{dummy2} \stoptext //floris

if i define a path q := (w0,w0)--(w0,ww0)--(w2,ww1)--(w3,ww2)--(w3,w0)--cycle ; and then pass this path as a parameter to a function test( q ) ; then within that function i can step through the 'list of points'. def test( expr a ) = for i = 1 upto (length(a)-2): dotlabel.bot ("" , (point i of a) ); endfor ; enddef; but how could i extract from each point the X and the Y value to construct the lines like this. for i = 1 upto (length(a)-2): z1 = (point i of a) ; draw (0,y1)--(100,y1) ; endfor; thanks! % floris