is about finding the cause of errors or wrong results in (La)TeX code/documents using a methodical approach.

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6
votes
1answer
1k views

How to find the exact location of Type 3 fonts in PDF?

While generating PDFs, we often ends up with some Type 3 fonts. We can find the existence of Type 3 fonts in a PDF by providing pdffonts <filename.pdf>. Also, can find the exact page by giving ...
6
votes
1answer
181 views

pdfcrop results in fmtutils.cnf not found

I just tried pdfcrop but it results in an error message telling me that the file fmtutil.cnf was not found. The complete error message is: pdfcrop testfile.pdf PDFCROP 1.38, 2012/11/02 - Copyright ...
6
votes
1answer
109 views

Strange result in plotting data using pgfplots

I'm trying to plot this: \begin{tikzpicture} \begin{axis}[ height=5cm, width=\linewidth] \addplot[smooth,blue] plot coordinates { (27,177) (28,223) (29,240) (30,227) ...
6
votes
1answer
277 views

Methods for debugging package conflicts

... that don't make me want to pull my (remaining) hair out. I'm preparing a long journal article with a wide array of necessary packages and a publisher-specific class file. In this specific case, ...
6
votes
2answers
1k views

How do automatic overlay specification work in beamer?

I've tried reading the excellent Beamer user guide, but failed to understand. I understand the basic idea: there's a counter beamerpauses that is advanced by a + inside an overlay specification. You ...
6
votes
2answers
762 views

hyperref incorrect links: how to debug?

Problem Statement. I am writing a large document that is too big to provide here for illustration. For the first hundred pages or so, the hyperlinks are correctly matched to the displayed text. For ...
6
votes
1answer
64 views

Discovering which (La)Tex element is shown by lua-visual-debug (print to stdout)?

I am trying to troubleshoot what happens in the code in Wrong placement (and/or size) of picture / plot with groupplot of table?. So I added \usepackage{lua-visual-debug} to that example, and built it ...
5
votes
2answers
1k views

Output ASCII code as character on terminal in Latex?

If I have a letter/character, I can output its ASCII value using \number and backtick command: *\typeout{\number`a} 97 What do I do if I have "97", and I want to show "a" in terminal? I have ...
5
votes
1answer
70 views

Biblatex field values and comparisons

I would like to change the behavior of printing author names based on the hash field in biblatex. This mwe should demonstrate what I am having difficulty understanding. MWE: \documentclass{article} ...
5
votes
1answer
1k views

How to debug an infinite loop in pdfLaTeX code

I have some code which crashes when loading the myriadpro package and loading in the document only the symbol \oiint \documentclass[]{scrbook} \usepackage[T1]{fontenc} \usepackage{amsmath} % ...
5
votes
1answer
1k views

Defining a custom ‘wrapfig’ environment

[ This is an updated version of http://stackoverflow.com/questions/3233031/latex-defining-a-custom-wrapfig-environment ] The wrapfig package interacts badly with the setup and teardown done by \begin ...
5
votes
1answer
139 views

Is there a list of common misleading errors and how to go about debugging the real problem

Yesterday I posted a question "My attempt to local redefine a command is failing and not sure why" which I really knew the answer to. But I was thrown by the error message I was getting and after ...
5
votes
0answers
318 views

Biblatex 2.1 bug [closed]

After updating my texlive 2012 installation using tlmgr update --all --self the biblatex was updated to version 2.1 and biber to version 1.1. Now I cannot compile my document. I get the following ...
4
votes
1answer
1k views

How to print out to “log” without affecting anything else (lua print equiv)

lua's print is very effective for my debugging purposes but I can't easily use it in TeX because of all the macro expansion issues. All it does is print the text to the window (console window or ...
4
votes
3answers
827 views

Error using \usepackage{fancyvrb, fancybox}

With TeX Live 2009, with this MWE. \documentclass{article} \usepackage{fancyvrb, fancybox} \begin{document} \begin{Verbatim}[frame=single] auto eth0 \end{Verbatim} \end{document} I ...
4
votes
1answer
78 views

Error persists after removing the code

I accidentally added an erroneous backslash to a code in the equation environment. Even after removing it - in fact even after removing the whole line - the error persists. ! Undefined control ...
4
votes
1answer
3k views

Latex image not found

running TeXnicCenter LaTex >> PDF produces the following error: LaTex warning: File 'Energy_Arc.png' not found. Output shows empty box where image should be (with same error as above written ...
4
votes
1answer
160 views

ybar stacked interferes with tikz background

When I compile the following code with ybar stacked option and the request for newsprint background the compiler tells me ! Extra }, or forgotten \endgroup. \endpgfonlayer ->\endgroup \hss \egroup ...
4
votes
1answer
56 views

Bad interaction between keycommand and environ?

I suspect the keycommand and environ packages are not playing nicely together, because the following code gives an error. Can anybody explain what's going on? \documentclass{article} ...
4
votes
2answers
66 views

Displaying plus and minus of a length

I know that \the\somelength will show me the value of \somelength. But how do I find out what the current stretch on that length is? For instance, if I have \setlength{\footnotesep}{10 pt plus 5pt ...
4
votes
1answer
294 views

Showing expanded `\let` command with `\typeout`

I have already seen the related page macros - What is the difference between \let and \edef?, but I'm afraid it still doesn't expain to me the following MWE: \documentclass{minimal} ...
4
votes
2answers
501 views

Visual debugging of lengths in paragraphs and environments?

During my searches, I found a couple of online images, which I doubt are produced with Latex - however, I found them immensely useful in understanding what is going on. I'm pretty sure the images ...
4
votes
1answer
340 views

Generating a catcode table in Latex (with \typeout to terminal)?

I often need to look up a catcode table, and quick searches on the web are rarely satisfying. So I thought, it must be (in the long term) easier to use a Latex function of sorts, to loop through all ...
4
votes
1answer
216 views

References by BibTeX key name [duplicate]

I've seen Use BibTeX key as the cite key, and it's quite close to what I'm looking for, but doesn't quite make it - for a start I can't get biblatex to run over my document, and second What I'm ...
4
votes
0answers
87 views

Error arising when using \typeout & \meaning with \midrule

In order to facilitate debugging some experimental code, I created a version of \typeout that will break its content into multiple lines: %% dummy macro for simulating newlines in output to terminal ...
3
votes
2answers
376 views

Trace values of parameters

I would like to print the value of a register into the document for 'debugging' purposes. For counters I would use \arabic{myCounter}. But \abovedisplayskip is not a counter.
3
votes
1answer
102 views

How to go deep and debug the real error?

(/usr/share/texlive/texmf-dist/tex/latex/thmtools/unique.sty Package: unique 2012/05/04 v63 \uniq@channel=\write6 \openout6 = `main.unq'. ) ! LaTeX Error: Missing \begin{document}. See the LaTeX ...
3
votes
2answers
446 views

TikZ error for externalized graphics but output is correct

This is not an MWE per se, but it is the code I boiled the problem down to. Note: it does not produce an error. The issue is that once I somehow managed to get an error for any TikZ or pgfplots ...
3
votes
1answer
189 views

Print macro output instead of executing

I am attempting to debug a Tikz/PGF script. I have a STY file that generates Tikz/PGF scripts, but the output graphic isn't quite what I want it to be. In order to debug the problem, I was hoping ...
3
votes
1answer
393 views

How can I check/debug a .cls file?

I am editing a .cls file in order to customize the output of a particular document. However, I am occasionally coming up against errors. Is it possible to check that my .cls file is valid (i.e. no ...
3
votes
1answer
70 views

Dump command as readable text?

Is it possible to dump the expanded form of a command as text? E.g. when I write a macro \newcommand{\mytest}[1]{\texttt{#1}} I would want to define a macro \mydump such that ...
3
votes
1answer
2k views

Debugging a custom-bib bst file that crashes on book items

I created my own bibliography file with custom-bib (makebst), but when I run it with a reference to a book I get: $ bibtex PhD [...normal output] Database file #1: PhD.bib You can't pop an empty ...
3
votes
1answer
509 views

Strange persisting error, even after removing the code.

After doing some changes to my document, I get a “Runaway Argument” error on compilation. After undoing these changes the error persists. However, when I copy the code to a new file or rename the .tex ...
3
votes
2answers
205 views

Debugging vertical space on top of page (section inside a custom biblatex cite command)?

Please consider the following MWE, compiled with lualatex test.tex (+ bibtex test + lualatex test.tex): \documentclass[twoside,a4paper]{book} \usepackage{lua-visual-debug} \usepackage{lipsum} ...
3
votes
1answer
750 views

Debugging Advice: TeX Capacity Exceeded with TeXLive2011 (but not with TeXLive2010)

I have a feeling that this is going to be rather embarrassing when I eventually get to the bottom of this problem, but since I have been struggling with this for some time I am posting this question ...
3
votes
1answer
270 views

Debugging font shape undefined in TeXShop

I am a LaTeX newbie on a Mac running OS X Mavericks, TexShop 3.26 and MacTeX-2013. I am writing a document and I keep getting the following warning: LaTeX Font Warning: Font shape `T1/phvr/m/n' ...
3
votes
1answer
39 views

Possible to run a handler / callback function, when a macro (\inputlineno) changes value/definition?

I was thinking about the debugging procedure I went through in How come the tilde ~ sometimes does not behave like non-breaking space? - basically, to find out where did the macro ~ change, I had to ...
3
votes
0answers
32 views

Debug log the text returned via tex.sprint() and friends?

Is there an easy way to see what text was sent from Lua to TeX via tex.sprint(), tex.print(), and tex.write()? (e.g., print it to stdout or log it to the .log file)
3
votes
0answers
174 views

Troubles with TeX Live 2009 and 2013

Well, before Christmas I was updating some software in my Ubuntu 12.04 installation, where I have happily installed TeX Live 2013 since last summer (I did it from an ISO image downloaded from the ...
3
votes
0answers
93 views

Pgfplots fails to generate boxplots for some data set

I use pgfplots to generate boxplots, however with some small data sets as the following, I get an error message. speed 2 3 1 2 2 11 Here is the error message : Sorry, an ...
3
votes
0answers
43 views

The \show command displays not all command [duplicate]

The TeX-primitive \show displays text of a command but I observed that not all, say LaTeX's commands, have been exhibited by this way. Opinions and solutions of experts please.........
3
votes
0answers
64 views

How to debug error message from luaotfload-database.lua

I am beginning to think it was a really bad idea to update to TeXLive 2013. Since this update almost none of my old documents compile any longer. Does anyone have any idea what LuaLaTeX is trying to ...
2
votes
2answers
341 views

Meaningful error messages when using latex instead of pdflatex

When I have TikZ images or I include .png graphics, I need to use pdflatex instead of plain vanilla latex. (That is, I need to use pdflatex all the time, rather than just when I want to produce the ...
2
votes
3answers
426 views

Help me to debug long LaTex equations with errors

I want to learn debugging of long LaTeX equations like below: $\tau=\int\frac{dt}{\gamma} = \int\sqrt{1-\frac{v(t)^2}{c^2}}dt = ...
2
votes
2answers
353 views

Strange behaviour debugging a document with AUCTeX-GNUEmacs in math mode

When I try to compile this document \documentclass{article} \usepackage{amsmath} \begin{document} A simple fraction with an error $\frac{a}{b$ \end{document} I obviously get an error because there ...
2
votes
4answers
526 views

Debugging - any packages that will draw individual line (and word) frame boxes?

I was just wandering if there is a package (or an option to a package, like \usepackage[showframe]{geometry}) that could emphasize/draw borders(/lines/frame) around each (and every) word; and/or each ...
2
votes
1answer
54 views

LaTeX: display hyphenation and justification problems

(At least) The article, report and book classes support the option draft, which displays hyphenation and justification problems with a black square, but also does not load figures. I could have the ...
2
votes
1answer
95 views

Unexpected hung latex compilation with property list retrieval

This is very closely related to a previous question of mine. From the comments to this previous question, I understand that my approach here is completely wrong headed. So why bother post a ...
2
votes
1answer
475 views

Unwanted spaces

The code given just after produces extra unwanted spaces indicated in the following picture. How can I fix it ? Sorry for the colors, this choices will be changed later when technical issues will be ...
2
votes
1answer
82 views

Overwrite \def to check if the command exists?

LyX supports math-macros, but sadly when passed to the latex processor, they are defined by a \def rather than a newcommand. I have found overwriting commands (e.g. using \def\v{\mathbf{v}}) to ...