Cannot find latex class when export org to pdf

[GeneKao]

Hi, I got an error when I tried 00-convert-latex-template-into-org-mode-template example and tried to export org file to pdf.

I cannot even export the self-check-example-02.org
It seems that it cannot read those local variables at the end of the file.

user-error: Unknown LaTeX class ‘epj-svjour’

Am I missing something? Thanks a lot.

[melioratus]

@GeneKao - Thanks for your patience!

I think I understand the issue and I apologize for any confusion.

I suspect that you tried to export to pdf to early in the tutorial.

My intention with the self-check examples is to provide a snapshot of the journal-template.org file after each major step when converting a LaTeX template into org syntax template.

Users won't be able to run the export to pdf until self-check-example-03.org because the org template will be missing code and configurations.

If you want to jump directly to exporting to pdf then you'll need to use either of the files listed below:

• journal-template.org
• self-check-example-04.org

If you export self-check-example-04.org to pdf then the output should be similar to the self-check-example-04.pdf

Thanks for asking your question!

Hope that helped!

@melioratus

[GeneKao]

@melioratus Thanks a lot for your clarification.

I also just realise that it's my emacs setting, it doesn't load the common export settings parts. It works perfectly after I run emacs with emacs -q or remove this babel setting in my .emacs file.

(org-babel-do-load-languages 'org-babel-load-languages
                               load-language-list)

However, while compiling journal-template.org still giving me error as following message:

This is pdfTeX, Version 3.14159265-2.6-1.40.20 (TeX Live 2019) (preloaded format=pdflatex)
 restricted \write18 enabled.
entering extended mode
(.//journal-template.tex
LaTeX2e <2018-12-01>

LaTeX Warning: File `leer.eps' already exists on the system.
               Not generating it from this source.

(.//svjour.cls
Document Class: svjour 2003/04/15 
LaTeX document class for Springer journals - version 1.11
(.//svepj.clo
SVJour Class option: svepj.clo for The European Physical Journal
)) (.//journal-template.aux) (.//journal-template.aux) )
No pages of output.
Transcript written on .//journal-template.log.

Thanks again.

[melioratus]

@GeneKao

I am not sure why journal-template.org didn't export to pdf but I suspect that the heart of the issue has to do with local LaTeX software installation and packages installed in Emacs.

To simplify Emacs integration with LaTeX, I always install auctex package.

 auctex is an installed package.

 Status: Installed in auctex-12.1.1/. Delete
 Version: 12.1.1
 Summary: Integrated environment for *TeX*
 Homepage: http://www.gnu.org/software/auctex/
 Other versions: 12.1.2 (gnu).

If installing auctex package doesn't fix issue, then let's confirm that your current LaTeX software can generate pdf from known "good" .tex files included in this git repository.

• Does the self-check-example-04.tex file compile correctly to pdf for you?

Thanks for your patience!

@melioratus

[GeneKao]

@melioratus Thanks for patiently answering my questions.

Yes, I could compile self-check-example-04.tex file to pdf, but not journal-template.org.

I got this in the *Org PDF LaTeX Output*

perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
	LC_ALL = (unset),
	LANG = "en_CH.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
Latexmk: This is Latexmk, John Collins, 17 March 2019, version: 4.63b.
Rule 'pdflatex': The following rules & subrules became out-of-date:
      'pdflatex'
------------
Run number 1 of rule 'pdflatex'
------------
------------
Running 'pdflatex -interaction nonstopmode  -recorder  "journal-template.tex"'
------------
Latexmk: applying rule 'pdflatex'...
This is pdfTeX, Version 3.14159265-2.6-1.40.20 (TeX Live 2019) (preloaded format=pdflatex)
 restricted \write18 enabled.
entering extended mode
(./journal-template.tex
LaTeX2e <2018-12-01>

LaTeX Warning: File `leer.eps' already exists on the system.
               Not generating it from this source.

(./svjour.cls
Document Class: svjour 2003/04/15 
LaTeX document class for Springer journals - version 1.11
(./svepj.clo
SVJour Class option: svepj.clo for The European Physical Journal
)) (./journal-template.aux) (./journal-template.aux) )
No pages of output.
Transcript written on journal-template.log.
Latexmk: Log file says no output from latex
Latexmk: For rule 'pdflatex', no output was made
Failure to make 'journal-template.pdf'
=== TeX engine is 'pdfTeX'
Latexmk: Errors, in force_mode: so I tried finishing targets

[melioratus]

@GeneKao - Thanks for your patience!

Please export journal-template.org as LaTeX file instead of pdf.

After the export, a new file named journal-template.tex should be generated.

Please post the LaTeX from the generated journal-template.tex file in your reply.

Thank you!

@melioratus

[GeneKao]

Thanks, @melioratus
Here's the LaTeX file

% Intended LaTeX compiler: pdflatex
%%%%%%%%%%%%%%%%%%%%%%%% epj-svjour %%%%%%%%%%%%%%%%%%%%%%%%%%
%
\begin{filecontents}{leer.eps}
%!PS-Adobe-2.0 EPSF-2.0
%%CreationDate: Mon Jul 13 16:51:17 1992
%%DocumentFonts: (atend)
%%Pages: 0 1
%%BoundingBox: 72 31 601 342
%%EndComments

gsave
72 31 moveto
72 342 lineto
601 342 lineto
601 31 lineto
72 31 lineto
showpage
grestore
%%Trailer
%%DocumentFonts: Helvetica
\end{filecontents}
%
\documentclass[epj]{svjour}
\date{}
\title{Title Goes Here\\\medskip
\large Subtitle Goes Here}
\begin{document}


\end{document}

[melioratus]

@GeneKao

Good news!

I was able to reproduce the issue by commenting out a line in the journal-template.org file.

e.g.

#+CALL: export-epj-latex-block()

will become

# #+CALL: export-epj-latex-block()

So my guess is that the #+CALL: export-epj-latex-block() line is commented, corrupted, missing or misbehaving in your copy of the template.

Note: The export-epj-latex-block() code creates the default fancy abstract and authors layout near the beginning of the document.

My guess is that #+CALL: export-epj-latex-block() is misbehaving because emacs-lisp may not be enabled during export because you wrote this earlier.

I also just realise that it's my emacs setting, it doesn't load the common export settings parts. It works perfectly after I run emacs with emacs -q or remove this babel setting in my .emacs file.

(org-babel-do-load-languages 'org-babel-load-languages
                              load-language-list)

• Is the emacs-lisp language enabled, i.e. t, in your org-babel-load-languages setting in your emacs init file?

  e.g.

   '(org-babel-load-languages
     (quote
      ((emacs-lisp . t))))

Thanks for your help!

@melioratus

[GeneKao]

Thanks a lot for your help @melioratus!

I am not sure that is the reason that causing the problem. I disabled them but still got the same error, and I also ran emacs -q, so emacs should not load anything.

Best,
@GeneKao

[melioratus]

@GeneKao

I apologize for the confusion.

What I intended was to enable to emacs-lisp in your setup.

Please add and enable emacs-lisp in your .emacs file.

I suspect that the issue is that the src blocks are not running when you export to LaTeX or pdf.

If the #+CALL: export-epj-latex-block() statement is not working and no other content was added to template then the document section will be empty when exported to LaTeX.
e.g.

\begin{document}


\end{document}

When the #+CALL: export-epj-latex-block() works and no other content was added to template then the document section will be display something similar to the example below when exported to LaTeX.

\begin{document}

%
\title{Title Goes Here}
\subtitle{Subtitle Goes Here}
\author{Mai Deah\inst{1} \and Arthur Secondus\inst{1} \and E. Tal\inst{2}% etc
% \thanks is optional - remove next line if not needed
\thanks{\emph{Present address:} Insert the address here if needed}%
}                     % Do not remove
%
\offprints{}          % Insert a name or remove this line
%
\institute{New Discoveries Lab, Department of Something-or-Ruther, University of Some-Sort, Some-Sort, Some-Sort-of-Country \and Golden Opportunities Lab, Department of Obscure Studies, Ancient College, Olde-Locale, Stodgy-Land}
%
\date{Received: date / Revised version: date}
% The correct dates will be entered by Springer
%
\abstract{
nil
%
\PACS{
      {PACS-key01}{Text Describing PACS-key01}   \and
      {PACS-key02}{Text Describing PACS-key02}
     } % end of PACS codes
} %end of abstract
%
\maketitle


%
% BibTeX users please use
% \bibliographystyle{}
% \bibliography{}
%
% Non-BibTeX users please use
\begin{thebibliography}{}
%
% and use \bibitem to create references.
%
\bibitem{RefJ}
% Format for Journal Reference
Author, Journal \textbf{Volume}, (year) page numbers.
% Format for books
\bibitem{RefB}
Author, \textit{Book title} (Publisher, place year) page numbers
% etc
\end{thebibliography}
\end{document}

Hope that Helps

@melioratus

[dunnl]

I had the same issue because I didn't let Emacs load the file local variables when I first opened the file. M-x normal-mode should give you the opportunity to make a different choice. It is certainly an issue with #+CALL: export-epj-latex-block() not executing.

[dunnl]

Actually I take that back. I restarted Emacs now I'm having the same issue as OP. Originally I had the issue, then reloaded the local variables with M-x normal-mode and then I could get the right output. Now I've restarted Emacs and I'm back to having the issue again. Not sure what changed.

This is on Emacs 26.3 with emacs -q on the files from the repo.

Edit: Problem went away by adding

  (org-babel-do-load-languages
   'org-babel-load-languages
   '((emacs-lisp . t) (latex . t)))

to init.el but I have no idea why I was able to run the examples without doing this before. Maybe I loaded something in babel by accident.