GNU bug report logs - #35363
12.1.2; Generation of previews fails under Windows 10

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Bernt Guldbrandtsen <bernt.guldbrandtsen <at> mbg.au.dk>
To: "bug-auctex <at> gnu.org" <bug-auctex <at> gnu.org>
Subject: 12.1.2; Generation of previews fails under Windows 10
Date: Sun, 21 Apr 2019 17:25:50 +0000

Hello!

Recently, generating previews under AUCTeX started to fail. Until some months ago,
I had a working setup.  The OS is Windows 10 (updated). A minimal working
example is shown below. Running LaTeX on _region_.tex works and the PDF
file produced contains the expected content. However, running gs fails
with no diagnostics.

The machine has MiKTeX's mgs and "normal" gswin64 installed. At the
Cygwin command prompt both can run the conversion successfully. MiKTeX
(64 bit version) is updated and has mgs version 9.25. Ghostscript (64
bit version) is updated and is version 9.27.

In Emacs,

   M-! mgs
   
and

   M-! gswin64
   
find mgs and gswin64 respectively as expected.

A command such as

  mgs -dDELAYSAFER -sDEVICE=png16m -dPrinter -dNOPLATFONTS
    -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -o 'pic-%d.png'
    _region_.pdf

produces the expected png output file.

It looks like mgs fails to run at all despite that Emacs is able
to find mgs.exe correctly.

Any pointers?

Best regards,

Bernt


Minimal example:
----
\documentclass{article}

\begin{document}

Here is a test.
\begin{displaymath}
  \alpha^2=\sqrt{\beta}\gamma^2
\end{displaymath}

\end{document}

%%% Local Variables:
%%% mode: latex
%%% TeX-master: t
%%% End:
----

Emacs  : GNU Emacs 25.3.1 (x86_64-w64-mingw32)
 of 2017-09-12
Package: 12.1.2

Run buffer contents:

Running `Preview-LaTeX' on `test' with ``pdflatex -ini  -interaction=nonstopmode "&pdflatex" "prv_test".ini  "\nonstopmode\nofiles\PassOptionsToPackage{active,tightpage,auctex}{preview}\AtBeginDocument{\ifx\ifPreview\undefined\RequirePackage[displaymath,floats,graphics,textmath,sections,footnotes]{preview}[2004/11/05]\fi}" "\input" "{\detokenize{" "test.tex" "}}"''
This is pdfTeX, Version 3.14159265-2.6-1.40.20 (MiKTeX 2.9.7000 64-bit) (INITEX)
entering extended mode
(prv_test.ini
LaTeX2e <2018-12-01>

("C:\Users\au154761\AppData\Local\Programs\MiKTeX 2.9\tex/latex/carlisle\mylate
x.ltx")
("C:\Users\au154761\AppData\Local\Programs\MiKTeX 2.9\tex/latex/tools\.tex"
File ignored))
No auxiliary output files.

(test.tex
("C:\Users\au154761\AppData\Local\Programs\MiKTeX 2.9\tex/latex/base\article.cl
s"
Document Class: article 2018/09/03 v1.4i Standard LaTeX document class
("C:\Users\au154761\AppData\Local\Programs\MiKTeX 2.9\tex/latex/base\size10.clo
")) )
Beginning to dump on file prv_test.fmt
 (preloaded format=prv_test 2019.4.21)
5823 strings of total length 84889
54972 memory locations dumped; current usage is 219&53497
4012 multiletter control sequences
\font\nullfont=nullfont
\font\OMX/cmex/m/n/5=cmex10
\font\tenln=line10
\font\tenlnw=linew10
\font\tencirc=lcircle10
\font\tencircw=lcirclew10
\font\OT1/cmr/m/n/5=cmr5
\font\OT1/cmr/m/n/7=cmr7
\font\OT1/cmr/m/n/10=cmr10
\font\OML/cmm/m/it/5=cmmi5
\font\OML/cmm/m/it/7=cmmi7
\font\OML/cmm/m/it/10=cmmi10
\font\OMS/cmsy/m/n/5=cmsy5
\font\OMS/cmsy/m/n/7=cmsy7
\font\OMS/cmsy/m/n/10=cmsy10
\font\OT1/cmr/m/n/12=cmr12
\font\OT1/cmr/m/n/8=cmr8
\font\OT1/cmr/bx/n/10=cmbx10
\font\OT1/cmr/bx/it/10=cmbxti10
\font\OT1/cmr/m/it/10=cmti10
\font\OT1/cmtt/m/n/10=cmtt10
\font\OT1/cmss/m/n/10=cmss10
5716 words of font info for 21 preloaded fonts
36 hyphenation exceptions
Hyphenation trie of length 105938 has 2723 ops out of 35111
  377 for language 16
  224 for language 15
  23 for language 13
  475 for language 12
  235 for language 11
  201 for language 10
  478 for language 9
  207 for language 8
  40 for language 7
  89 for language 6
  60 for language 4
  36 for language 2
  97 for language 1
  181 for language 0
0 words of pdfTeX memory
0 indirect objects
No pages of output.
Transcript written on prv_test.log.

TeX Output finished at Sun Apr 21 18:59:13
Running `Preview-LaTeX' on `~/test8/_region_' with ``pdflatex  -interaction=nonstopmode -file-line-error "&prv_test" "/AUCTEXINPUT{" "_region_.tex" "}"''
This is pdfTeX, Version 3.14159265-2.6-1.40.20 (MiKTeX 2.9.7000 64-bit)
entering extended mode
LaTeX2e <2018-12-01>
CUSTOMISED FORMAT. Preloaded files:
        .
     test.tex 
 article.cls    2018/09/03 v1.4i Standard LaTeX document class
  size10.clo    2018/09/03 v1.4i Standard LaTeX file (size option)
        .
(_region_.tex (_region_.aux)
(c:/cygwin64/home/au154761/.emacs.d/elpa/auctex-12.1.2/latex\preview.sty
("C:\Users\au154761\AppData\Local\Programs\MiKTeX 2.9\tex/generic/luatex85\luat
ex85.sty")
(c:/cygwin64/home/au154761/.emacs.d/elpa/auctex-12.1.2/latex\prtightpage.def)
(c:/cygwin64/home/au154761/.emacs.d/elpa/auctex-12.1.2/latex\prauctex.def
No auxiliary output files.


(c:/cygwin64/home/au154761/.emacs.d/elpa/auctex-12.1.2/latex\prauctex.cfg))
(c:/cygwin64/home/au154761/.emacs.d/elpa/auctex-12.1.2/latex\prfootnotes.def)
Preview: Fontsize 10pt
Preview: PDFoutput 1
)  !name(test.tex) !offset(-3) 
_region_.tex:9: Preview: Snippet 1 started
Preview: Tightpage -32891 -32891 32891 32891
_region_.tex:11: Preview: Snippet 1 ended.(1609687+0x22609920)
[1{C:/Users/au154761/AppData/Local/MiKTeX/2.9/pdftex/config/pdftex.map}] )
(see the transcript file for additional information)<C:/Users/au154761/AppData/
Local/Programs/MiKTeX 2.9/fonts/type1/public/amsfonts/cm/cmex10.pfb><C:/Users/a
u154761/AppData/Local/Programs/MiKTeX 2.9/fonts/type1/public/amsfonts/cm/cmmi10
.pfb><C:/Users/au154761/AppData/Local/Programs/MiKTeX 2.9/fonts/type1/public/am
sfonts/cm/cmr10.pfb><C:/Users/au154761/AppData/Local/Programs/MiKTeX 2.9/fonts/
type1/public/amsfonts/cm/cmr7.pfb>
Output written on _region_.pdf (1 page, 31451 bytes).
Transcript written on _region_.log.

TeX Output exited as expected with code 1 at Sun Apr 21 18:59:13
LaTeX: LaTeX found no preview images


current state:
==============
(setq
 AUCTeX-version "12.1.2"
 LaTeX-command-style '((""
			"%(PDF)%(latex) %(file-line-error) %(extraopts) %S%(PDFout)")
		       )
 image-types '(svg png gif tiff jpeg xpm xbm pbm)
 preview-image-type 'png
 preview-image-creators '((dvipng
			   (open preview-gs-open preview-dvipng-process-setup)
			   (place preview-gs-place)
			   (close preview-dvipng-close))
			  (png (open preview-gs-open) (place preview-gs-place)
			   (close preview-gs-close))
			  (jpeg (open preview-gs-open)
			   (place preview-gs-place) (close preview-gs-close))
			  (pnm (open preview-gs-open) (place preview-gs-place)
			   (close preview-gs-close))
			  (tiff (open preview-gs-open)
			   (place preview-gs-place) (close preview-gs-close))
			  )
 preview-dvipng-image-type 'png
 preview-dvipng-command "dvipng -picky -noghostscript %d -o %m/prev%%03d.png"
 preview-pdf2dsc-command "pdf2dsc %s.pdf %m/preview.dsc"
 preview-gs-command "c:/Users/au154761/AppData/Local/Programs/MiKTeX 2.9/miktex/bin/x64/mgs.exe"
 preview-gs-options '("-q" "-dDELAYSAFER" "-dNOPAUSE" "-DNOPLATFONTS"
		      "-dPrinted" "-dTextAlphaBits=4" "-dGraphicsAlphaBits=4")
 preview-gs-image-type-alist '((png png "-sDEVICE=png16m")
			       (dvipng png "-sDEVICE=png16m")
			       (jpeg jpeg "-sDEVICE=jpeg")
			       (pnm pbm "-sDEVICE=pnmraw")
			       (tiff tiff "-sDEVICE=tiff12nc"))
 preview-fast-conversion t
 preview-prefer-TeX-bb nil
 preview-dvips-command "dvips -Pwww -i -E %d -o %m/preview.000"
 preview-fast-dvips-command "dvips -Pwww %d -o %m/preview.ps"
 preview-scale-function 0.8
 preview-LaTeX-command '("%`%l \"\\nonstopmode\\nofiles\\PassOptionsToPackage{"
			 ("," . preview-required-option-list)
			 "}{preview}\\AtBeginDocument{\\ifx\\ifPreview\\undefined" preview-default-preamble "\\fi}\"%' \"{\\detokenize{\" %t \"}}\"")
 preview-required-option-list '("active" "tightpage" "auctex"
				(preview-preserve-counters "counters"))
 preview-preserve-counters nil
 preview-default-option-list '("displaymath" "floats" "graphics" "textmath"
			       "sections" "footnotes")
 preview-default-preamble '("\\RequirePackage["
			    ("," . preview-default-option-list)
			    "]{preview}[2004/11/05]")
 preview-LaTeX-command-replacements nil
 preview-dump-replacements '(preview-LaTeX-command-replacements
			     ("\\`\\([^ ]+\\)\\(?: +\\(?:\\(--?kanji[= ][^ ]+\\)\\|-\\(?:[^ \\\"]\\|\\\\.\\|\"[^\"]*\"\\)*\\)\\)*\\(.*\\)\\'" "\\1 -ini \\2 -interaction=nonstopmode \"&\\1\" " preview-format-name ".ini \\3")
			     )
 preview-undump-replacements '(("\\`\\([^ ]+\\)\\(?: +\\(?:\\(--?kanji[= ][^ ]+\\)\\|-\\(?:[^ \\\"]\\|\\\\.\\|\"[^\"]*\"\\)*\\)\\)*.* \"\\\\input\" \"{\\\\detokenize{\" \\(.*\\) \"}}\"\\'" "\\1 \\2 -interaction=nonstopmode -file-line-error " preview-format-name " \"/AUCTEXINPUT{\" \\3 \"}\"")
			       )
 preview-auto-cache-preamble t
 preview-TeX-style-dir "c:/cygwin64/home/au154761/.emacs.d/elpa/auctex-12.1.2/latex"
 )

Output from running `c:/Users/au154761/AppData/Local/Programs/MiKTeX 2.9/miktex/bin/x64/mgs.exe -h':
MiKTeX GPL Ghostscript 9.25 (2018-09-13)
Copyright (C) 2018 Artifex Software, Inc.  All rights reserved.
Usage: gs [switches] [file1.ps file2.ps ...]
Most frequently used switches: (you can use # in place of =)
 -dNOPAUSE           no pause after page   | -q       `quiet', fewer messages
 -g<width>x<height>  page size in pixels   | -r<res>  pixels/inch resolution
 -sDEVICE=<devname>  select device         | -dBATCH  exit after last file
 -sOutputFile=<file> select output file: - for stdout, |command for pipe,
                                         embed %d or %ld for page #
Input formats: PostScript PostScriptLevel1 PostScriptLevel2 PostScriptLevel3 PDF
Default output device: display
Available devices:
   bbox bit bitcmyk bitrgb bitrgbtags bj10e bj200 bjc600 bjc800 bmp16 bmp16m
   bmp256 bmp32b bmpgray bmpmono bmpsep1 bmpsep8 cdeskjet cdj550 cdjcolor
   cdjmono declj250 deskjet devicen display djet500 djet500c eps2write
   eps9high eps9mid epson epsonc fpng gprf ibmpro ijs ink_cov inkcov
   jetp3852 jpeg jpegcmyk jpeggray laserjet lbp8 lj250 ljet2p ljet3 ljet3d
   ljet4 ljet4d ljetplus m8510 mswinpr2 necp6 nullpage pam pamcmyk32
   pamcmyk4 pbm pbmraw pclm pcx16 pcx24b pcx256 pcxcmyk pcxgray pcxmono
   pdfimage24 pdfimage32 pdfimage8 pdfwrite pgm pgmraw pgnm pgnmraw pj pjxl
   pjxl300 pkmraw plan planc plang plank planm planr plib plibc plibg plibk
   plibm png16 png16m png256 pngalpha pnggray pngmono pngmonod pnm pnmcmyk
   pnmraw ppm ppmraw ps2write psdcmyk psdcmykog psdrgb pxlcolor pxlmono
   r4081 spotcmyk st800 stcolor t4693d2 t4693d4 t4693d8 tek4696 tiff12nc
   tiff24nc tiff32nc tiff48nc tiff64nc tiffcrle tiffg3 tiffg32d tiffg4
   tiffgray tifflzw tiffpack tiffscaled tiffscaled24 tiffscaled32
   tiffscaled4 tiffscaled8 tiffsep tiffsep1 txtwrite uniprint xpswrite
Search path:
   %rom%Resource/Init/ ; %rom%lib/ ; c:/gs/gs9.25/Resource/Init ;
   c:/gs/gs9.25/lib ; c:/gs/gs9.25/Resource/Font ; c:/gs/fonts
Initialization files are compiled into the executable.
For more information, see c:/gs/gs9.25/doc/Use.htm.
Please report bugs to bugs.ghostscript.com.

Message #8 received at 35363 <at> debbugs.gnu.org (full text, mbox):

From: Arash Esbati <arash <at> gnu.org>
To: Bernt Guldbrandtsen <bernt.guldbrandtsen <at> mbg.au.dk>
Cc: 35363 <at> debbugs.gnu.org
Subject: Re: bug#35363: 12.1.2; Generation of previews fails under Windows 10
Date: Tue, 23 Apr 2019 22:32:42 +0200

[Message part 1 (text/plain, inline)]

Bernt Guldbrandtsen <bernt.guldbrandtsen <at> mbg.au.dk> writes:

> Recently, generating previews under AUCTeX started to fail. Until some months ago,
> I had a working setup.  The OS is Windows 10 (updated). A minimal working
> example is shown below. Running LaTeX on _region_.tex works and the PDF
> file produced contains the expected content. However, running gs fails
> with no diagnostics.
>
> The machine has MiKTeX's mgs and "normal" gswin64 installed. At the
> Cygwin command prompt both can run the conversion successfully. MiKTeX
> (64 bit version) is updated and has mgs version 9.25. Ghostscript (64
> bit version) is updated and is version 9.27.
>
> In Emacs,
>
>    M-! mgs
>    
> and
>
>    M-! gswin64
>    
> find mgs and gswin64 respectively as expected.
>
> A command such as
>
>   mgs -dDELAYSAFER -sDEVICE=png16m -dPrinter -dNOPLATFONTS
>     -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -o 'pic-%d.png'
>     _region_.pdf
>
> produces the expected png output file.
>
> It looks like mgs fails to run at all despite that Emacs is able
> to find mgs.exe correctly.
>
> Any pointers?

Hi Bernt,

thanks for the report.  I tried your example and it works for me:

[pic-1.png (image/png, inline)]

[Message part 3 (text/plain, inline)]

It is on a Win10 box but with TeXlive installed and not MikTeX.  Preview
uses in this case `rungs.exe' (TeXlive's counterpart of mgs).  I've set
the variable `preview-gs-command' to gswin64c.exe and indeed it didn't
work as well.  My current guess is that running `pdf2dsc ...' somehow
fails.  TeXlive ships a small executable called pdf2dsc.exe which seems
to do the job.  Does MikTeX comes with such a thing?

Best, Arash

Message #11 received at 35363 <at> debbugs.gnu.org (full text, mbox):

From: Bernt Guldbrandtsen <bernt.guldbrandtsen <at> mbg.au.dk>
To: Arash Esbati <arash <at> gnu.org>
Cc: "35363 <at> debbugs.gnu.org" <35363 <at> debbugs.gnu.org>
Subject: RE: bug#35363: 12.1.2; Generation of previews fails under Windows 10
Date: Fri, 26 Apr 2019 12:28:04 +0000

Dear Arash,

Thank you for checking.

Is there a way to get additional debug output to  see exactly what step fails?

Best regards,

Bernt

> -----Original Message-----
> From: Arash Esbati <arash <at> gnu.org>
> Sent: 23. april 2019 22:33
> To: Bernt Guldbrandtsen <bernt.guldbrandtsen <at> mbg.au.dk>
> Cc: 35363 <at> debbugs.gnu.org
> Subject: Re: bug#35363: 12.1.2; Generation of previews fails under Windows 10
> 
> Bernt Guldbrandtsen <bernt.guldbrandtsen <at> mbg.au.dk> writes:
> 
> > Recently, generating previews under AUCTeX started to fail. Until some
> > months ago, I had a working setup.  The OS is Windows 10 (updated). A
> > minimal working example is shown below. Running LaTeX on _region_.tex
> > works and the PDF file produced contains the expected content.
> > However, running gs fails with no diagnostics.
> >
> > The machine has MiKTeX's mgs and "normal" gswin64 installed. At the
> > Cygwin command prompt both can run the conversion successfully. MiKTeX
> > (64 bit version) is updated and has mgs version 9.25. Ghostscript (64
> > bit version) is updated and is version 9.27.
> >
> > In Emacs,
> >
> >    M-! mgs
> >
> > and
> >
> >    M-! gswin64
> >
> > find mgs and gswin64 respectively as expected.
> >
> > A command such as
> >
> >   mgs -dDELAYSAFER -sDEVICE=png16m -dPrinter -dNOPLATFONTS
> >     -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -o 'pic-%d.png'
> >     _region_.pdf
> >
> > produces the expected png output file.
> >
> > It looks like mgs fails to run at all despite that Emacs is able to
> > find mgs.exe correctly.
> >
> > Any pointers?
> 
> Hi Bernt,
> 
> thanks for the report.  I tried your example and it works for me:

Message #14 received at 35363 <at> debbugs.gnu.org (full text, mbox):

From: Arash Esbati <arash <at> gnu.org>
To: Bernt Guldbrandtsen <bernt.guldbrandtsen <at> mbg.au.dk>
Cc: "35363 <at> debbugs.gnu.org" <35363 <at> debbugs.gnu.org>
Subject: Re: bug#35363: 12.1.2; Generation of previews fails under Windows 10
Date: Sat, 27 Apr 2019 22:59:06 +0200

Bernt Guldbrandtsen <bernt.guldbrandtsen <at> mbg.au.dk> writes:

> Is there a way to get additional debug output to see exactly what step
> fails?

Hi Bernt,

the usual way is `M-x toggle-debug-on-error RET'.

Best, Arash

Message #17 received at 35363 <at> debbugs.gnu.org (full text, mbox):

From: Ikumi Keita <ikumi <at> ikumi.que.jp>
To: Arash Esbati <arash <at> gnu.org>
Cc: Bernt Guldbrandtsen <bernt.guldbrandtsen <at> mbg.au.dk>, 35363 <at> debbugs.gnu.org
Subject: Re: bug#35363: 12.1.2; Generation of previews fails under Windows 10
Date: Sun, 28 Apr 2019 22:19:48 +0900

Hi Bernt and Arash,

>>>>> Arash Esbati <arash <at> gnu.org> writes:
> Bernt Guldbrandtsen <bernt.guldbrandtsen <at> mbg.au.dk> writes:
>> Recently, generating previews under AUCTeX started to fail. Until some months ago,
>> I had a working setup.  The OS is Windows 10 (updated). A minimal working
>> example is shown below. Running LaTeX on _region_.tex works and the PDF
>> file produced contains the expected content. However, running gs fails
>> with no diagnostics.
>> 
>> The machine has MiKTeX's mgs and "normal" gswin64 installed. At the
>> Cygwin command prompt both can run the conversion successfully. MiKTeX
>> (64 bit version) is updated and has mgs version 9.25. Ghostscript (64
>> bit version) is updated and is version 9.27.
>> 
>> In Emacs,
>> 
>> M-! mgs
>> 
>> and
>> 
>> M-! gswin64
>> 
>> find mgs and gswin64 respectively as expected.
>> 
>> A command such as
>> 
>> mgs -dDELAYSAFER -sDEVICE=png16m -dPrinter -dNOPLATFONTS
>> -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -o 'pic-%d.png'
>> _region_.pdf
>> 
>> produces the expected png output file.
>> 
>> It looks like mgs fails to run at all despite that Emacs is able
>> to find mgs.exe correctly.
>> 
>> Any pointers?

> Hi Bernt,

> thanks for the report.  I tried your example and it works for me:

I think that the reason of the fail is due to, at least partially, the
log format which MiKTeX produces.

-------- Bernt's log (by MikTeX) --------
...
region_.tex:9: Preview: Snippet 1 started
Preview: Tightpage -32891 -32891 32891 32891
_region_.tex:11: Preview: Snippet 1 ended.(1609687+0x22609920)
...
-----------------------------------------

-------- my log (by TeXLive) ------------
...
./tst-prv.tex:6: Preview: Snippet 1 started.
<-><->
      
l.6 \begin{displaymath}
                       
Preview: Tightpage -32891 -32891 32891 32891
./tst-prv.tex:8: Preview: Snippet 1 ended.(1609687+0x22609920).
<-><->
...
-----------------------------------------

Compare the absence and presence of periods at the end of line of the
sentences "Snippet 1 {started,ended}".  Preview-latex searches in the
log message, in the function `preview-parse-messages', with the
following regular expression, which requires the period at the end of
line:
\\(?:Preview\\|Package Preview Error\\): Snippet \\([---0-9]+\\) \\(started\\|ended\\(\
\\.? *(\\([---0-9]+\\)\\+\\([---0-9]+\\)x\\([---0-9]+\\))\\)?\\)\\."

In addition, Bernt's log lacks the information where to put the image in
the latex document buffer, which is embedded in my log as the line
l.6 \begin{displaymath}

Due to these two, at least, reasons, preview-latex cannot pick up
necessary information from the log messages.  I guess that MikTeX
costomizes the log output format of latex.  If this guess is correct, it
would necessary for MikTeX to discard that customize in order to use
preview-latex with MikTeX.

Best regards,
Ikumi Keita

Message #20 received at 35363 <at> debbugs.gnu.org (full text, mbox):

From: Bernt Guldbrandtsen <bernt.guldbrandtsen <at> mbg.au.dk>
To: Ikumi Keita <ikumi <at> ikumi.que.jp>, Arash Esbati <arash <at> gnu.org>
Cc: "35363 <at> debbugs.gnu.org" <35363 <at> debbugs.gnu.org>
Subject: RE: bug#35363: 12.1.2; Generation of previews fails under Windows 10
Date: Sun, 28 Apr 2019 16:11:51 +0000

Hi,

Emacs debugger outputs:

Debugger entered--Lisp error: (error "LaTeX found no preview images")
  signal(error ("LaTeX found no preview images"))
  preview-reraise-error(#<process Preview-LaTeX>)
  preview-TeX-inline-sentinel(#<process Preview-LaTeX> "Preview-LaTeX")
  TeX-command-sentinel(#<process Preview-LaTeX> "exited abnormally with code 1\n")

which doesn't help.

Should this feature be reported to the MiKTeX author as a bug, or should it be handled by modifying the relevant patterns in AUCTeX?

Best regards,

Bernt

> -----Original Message-----
> I think that the reason of the fail is due to, at least partially, the log format
> which MiKTeX produces.
> 
> -------- Bernt's log (by MikTeX) -------- ...
> region_.tex:9: Preview: Snippet 1 started
> Preview: Tightpage -32891 -32891 32891 32891
> _region_.tex:11: Preview: Snippet 1 ended.(1609687+0x22609920) ...
> -----------------------------------------
> 
> -------- my log (by TeXLive) ------------ ...
> ./tst-prv.tex:6: Preview: Snippet 1 started.
> <-><->
> 
> l.6 \begin{displaymath}
> 
> Preview: Tightpage -32891 -32891 32891 32891
> ./tst-prv.tex:8: Preview: Snippet 1 ended.(1609687+0x22609920).
> <-><->
> ...
> -----------------------------------------
> 
> Compare the absence and presence of periods at the end of line of the
> sentences "Snippet 1 {started,ended}".  Preview-latex searches in the log
> message, in the function `preview-parse-messages', with the following regular
> expression, which requires the period at the end of
> line:
> \\(?:Preview\\|Package Preview Error\\): Snippet \\([---0-9]+\\)
> \\(started\\|ended\\(\ \\.? *(\\([---0-9]+\\)\\+\\([---0-9]+\\)x\\([---0-
> 9]+\\))\\)?\\)\\."
> 
> In addition, Bernt's log lacks the information where to put the image in the latex
> document buffer, which is embedded in my log as the line
> l.6 \begin{displaymath}
> 
> Due to these two, at least, reasons, preview-latex cannot pick up necessary
> information from the log messages.  I guess that MikTeX costomizes the log
> output format of latex.  If this guess is correct, it would necessary for MikTeX to
> discard that customize in order to use preview-latex with MikTeX.
> 
> Best regards,
> Ikumi Keita

Message #23 received at 35363 <at> debbugs.gnu.org (full text, mbox):

From: Ikumi Keita <ikumi <at> ikumi.que.jp>
To: Bernt Guldbrandtsen <bernt.guldbrandtsen <at> mbg.au.dk>
Cc: Arash Esbati <arash <at> gnu.org>,
 "35363 <at> debbugs.gnu.org" <35363 <at> debbugs.gnu.org>
Subject: Re: bug#35363: 12.1.2; Generation of previews fails under Windows 10
Date: Mon, 29 Apr 2019 21:44:32 +0900

Hi Bernt,

>>>>> Bernt Guldbrandtsen <bernt.guldbrandtsen <at> mbg.au.dk> writes:

> Should this feature be reported to the MiKTeX author as a bug, or
> should it be handled by modifying the relevant patterns in AUCTeX?

If my guess is correct, the simplest solution is to remove the MiKTeX
customize on the output format of latex log.  So I think that it would
be worth asking the MiKTeX author to do so.
However, I'm not 100% sure this is a bug of MiKTeX because the MiKTeX
author may have some good reason to customize the log format in such a
way.  In that case, solving this problem would not be so easy.
It requires that someone fluent at LaTeX programming in TeX language
(absolutely I'm not) revises preview.dtx so that the generated
preview.sty can output the necessary information even used under MiKTeX,
in order to use preview-latex in MiKTeX.

Just modifying the regular expression, discussed below, on AUCTeX side
helps almost nothing, because it doesn't make MiKTeX to output the key
ingredients like
l.6 \begin{displaymath}
which preview-latex needs in order to locate the position in the latex
document buffer to put the generated image.

Best regards,
Ikumi Keita

>> -----Original Message-----
>> I think that the reason of the fail is due to, at least partially, the log format
>> which MiKTeX produces.
>> 
>> -------- Bernt's log (by MikTeX) -------- ...
>> _region_.tex:9: Preview: Snippet 1 started
>> Preview: Tightpage -32891 -32891 32891 32891
>> _region_.tex:11: Preview: Snippet 1 ended.(1609687+0x22609920) ...
>> -----------------------------------------
>> 
>> -------- my log (by TeXLive) ------------ ...
>> ./tst-prv.tex:6: Preview: Snippet 1 started.
>> <-><->
>> 
>> l.6 \begin{displaymath}
>> 
>> Preview: Tightpage -32891 -32891 32891 32891
>> ./tst-prv.tex:8: Preview: Snippet 1 ended.(1609687+0x22609920).
>> <-><->
>> ...
>> -----------------------------------------
>> 
>> Compare the absence and presence of periods at the end of line of the
>> sentences "Snippet 1 {started,ended}".  Preview-latex searches in the log
>> message, in the function `preview-parse-messages', with the following regular
>> expression, which requires the period at the end of
>> line:
>> \\(?:Preview\\|Package Preview Error\\): Snippet \\([---0-9]+\\)
>> \\(started\\|ended\\(\ \\.? *(\\([---0-9]+\\)\\+\\([---0-9]+\\)x\\([---0-
>> 9]+\\))\\)?\\)\\."
>> 
>> In addition, Bernt's log lacks the information where to put the image in the latex
>> document buffer, which is embedded in my log as the line
>> l.6 \begin{displaymath}
>> 
>> Due to these two, at least, reasons, preview-latex cannot pick up necessary
>> information from the log messages.  I guess that MikTeX costomizes the log
>> output format of latex.  If this guess is correct, it would necessary for MikTeX to
>> discard that customize in order to use preview-latex with MikTeX.

Message #26 received at 35363 <at> debbugs.gnu.org (full text, mbox):

From: Mosè Giordano <mose <at> gnu.org>
To: Ikumi Keita <ikumi <at> ikumi.que.jp>
Cc: Bernt Guldbrandtsen <bernt.guldbrandtsen <at> mbg.au.dk>,
 Arash Esbati <arash <at> gnu.org>, "35363 <at> debbugs.gnu.org" <35363 <at> debbugs.gnu.org>
Subject: Re: bug#35363: 12.1.2; Generation of previews fails under Windows 10
Date: Mon, 29 Apr 2019 13:50:35 +0100

On Mon, 29 Apr 2019 at 13:45, Ikumi Keita <ikumi <at> ikumi.que.jp> wrote:
> So I think that it would
> be worth asking the MiKTeX author to do so.

Don't expect quick response though: https://sourceforge.net/p/miktex/bugs/2310/

Message #29 received at 35363 <at> debbugs.gnu.org (full text, mbox):

From: Bernt Guldbrandtsen <bernt.guldbrandtsen <at> mbg.au.dk>
To: Mosè Giordano <mose <at> gnu.org>, Ikumi Keita
 <ikumi <at> ikumi.que.jp>
Cc: Arash Esbati <arash <at> gnu.org>,
 "35363 <at> debbugs.gnu.org" <35363 <at> debbugs.gnu.org>
Subject: RE: bug#35363: 12.1.2; Generation of previews fails under Windows 10
Date: Mon, 29 Apr 2019 14:03:47 +0000

For what it's worth, activating the error reporting option (discussed at https://tex.stackexchange.com/questions/124246/uninformative-error-message-when-using-auctex/124259#124259) in MiKTeX does not fix the problem

initexmf.exe --set-config-value="[TeXandFriends]CStyleErrors=t"

I'm not sure, doing so even has any effect.

> -----Original Message-----
> From: Mosè Giordano <mose <at> gnu.org>
> Sent: 29. april 2019 14:51
> To: Ikumi Keita <ikumi <at> ikumi.que.jp>
> Cc: Bernt Guldbrandtsen <bernt.guldbrandtsen <at> mbg.au.dk>; Arash Esbati
> <arash <at> gnu.org>; 35363 <at> debbugs.gnu.org
> Subject: Re: bug#35363: 12.1.2; Generation of previews fails under Windows 10
> 
> On Mon, 29 Apr 2019 at 13:45, Ikumi Keita <ikumi <at> ikumi.que.jp> wrote:
> > So I think that it would
> > be worth asking the MiKTeX author to do so.
> 
> Don't expect quick response though:
> https://sourceforge.net/p/miktex/bugs/2310/

Message #32 received at 35363 <at> debbugs.gnu.org (full text, mbox):

From: Ikumi Keita <ikumi <at> ikumi.que.jp>
To: Bernt Guldbrandtsen <bernt.guldbrandtsen <at> mbg.au.dk>
Cc: Arash Esbati <arash <at> gnu.org>,
 Mosè Giordano <mose <at> gnu.org>,
 "35363 <at> debbugs.gnu.org" <35363 <at> debbugs.gnu.org>
Subject: Re: bug#35363: 12.1.2; Generation of previews fails under Windows 10
Date: Mon, 29 Apr 2019 23:58:31 +0900

Maybe even simpler "solution" might be to switch from MiKTeX to
TeXLive...

Bye,
Ikumi Keita

>>>>> Bernt Guldbrandtsen <bernt.guldbrandtsen <at> mbg.au.dk> writes:
> For what it's worth, activating the error reporting option (discussed at https://tex.stackexchange.com/questions/124246/uninformative-error-message-when-using-auctex/124259#124259) in MiKTeX does not fix the problem
> initexmf.exe --set-config-value="[TeXandFriends]CStyleErrors=t"

> I'm not sure, doing so even has any effect.

>> -----Original Message-----
>> From: Mosè Giordano <mose <at> gnu.org>
>> Sent: 29. april 2019 14:51
>> To: Ikumi Keita <ikumi <at> ikumi.que.jp>
>> Cc: Bernt Guldbrandtsen <bernt.guldbrandtsen <at> mbg.au.dk>; Arash Esbati
>> <arash <at> gnu.org>; 35363 <at> debbugs.gnu.org
>> Subject: Re: bug#35363: 12.1.2; Generation of previews fails under Windows 10
>> 
>> On Mon, 29 Apr 2019 at 13:45, Ikumi Keita <ikumi <at> ikumi.que.jp> wrote:
>> > So I think that it would
>> > be worth asking the MiKTeX author to do so.
>> 
>> Don't expect quick response though:
>> https://sourceforge.net/p/miktex/bugs/2310/

Message #35 received at 35363 <at> debbugs.gnu.org (full text, mbox):

From: Arash Esbati <arash <at> gnu.org>
To: Ikumi Keita <ikumi <at> ikumi.que.jp>
Cc: Bernt Guldbrandtsen <bernt.guldbrandtsen <at> mbg.au.dk>,
 Mosè Giordano <mose <at> gnu.org>,
 "35363 <at> debbugs.gnu.org" <35363 <at> debbugs.gnu.org>
Subject: Re: bug#35363: 12.1.2; Generation of previews fails under Windows 10
Date: Mon, 04 Mar 2024 23:13:54 +0100

Ikumi Keita <ikumi <at> ikumi.que.jp> writes:

> Maybe even simpler "solution" might be to switch from MiKTeX to
> TeXLive...
>
> Bye,
> Ikumi Keita
>
>>>>>> Bernt Guldbrandtsen <bernt.guldbrandtsen <at> mbg.au.dk> writes:
>> For what it's worth, activating the error reporting option
>> (discussed at
>> https://tex.stackexchange.com/questions/124246/uninformative-error-message-when-using-auctex/124259#124259)
>> in MiKTeX does not fix the problem
>> initexmf.exe --set-config-value="[TeXandFriends]CStyleErrors=t"
>
>> I'm not sure, doing so even has any effect.
>
>>> -----Original Message-----
>>> From: Mosè Giordano <mose <at> gnu.org>
>>> Sent: 29. april 2019 14:51
>>> To: Ikumi Keita <ikumi <at> ikumi.que.jp>
>>> Cc: Bernt Guldbrandtsen <bernt.guldbrandtsen <at> mbg.au.dk>; Arash Esbati
>>> <arash <at> gnu.org>; 35363 <at> debbugs.gnu.org
>>> Subject: Re: bug#35363: 12.1.2; Generation of previews fails under Windows 10
>>> 
>>> On Mon, 29 Apr 2019 at 13:45, Ikumi Keita <ikumi <at> ikumi.que.jp> wrote:
>>> > So I think that it would
>>> > be worth asking the MiKTeX author to do so.
>>> 
>>> Don't expect quick response though:
>>> https://sourceforge.net/p/miktex/bugs/2310/

(I'm going through old bug reports that unfortunately weren't resolved
at the time.)

Since we're dealing with non-standard messages (sort of) specific to
MikTeX, I'd say this "wontfix".  Therefore, I'm closing this report.

Best, Arash

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