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I have a trial.tex file with the following content:

\documentclass[12pt,twoside]{report}

\usepackage{biblatex}
\addbibresource{trial_ref.bib}


\begin{document}


2 plus 2 equals 4.\parencite{test}


\printbibliography


\end{document}

And then a trial_ref.bib file located at the same directory:

@article{test,
    author = {Pythagoras},
    title = {On the result of 2 + 2},
    journaltitle = {Ellinikos Mathematikos},
    year = {100 bC}
}

However I don't get a bibliography section at all.

zest16
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    Did you actually run biber? It does not happen automatically? You need to run something similar to pdflatex, biber, pdflatex, pdflatex. With that your example works fine for me. – daleif May 23 '22 at 08:01
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    Did you compile your document with LaTeX, Biber, LaTeX, LaTeX (where "LaTeX" can be your favourite flavour of LaTeX: pdfLaTeX, LuaLaTeX, XeLaTeX, ...)? https://tex.stackexchange.com/q/63852/35864 explains why that is necessary (the linked answer is for both BibTeX and Biber, but you need to run Biber). If you work from an editor and your editor runs LaTeX for you, you may have to configure it for Biber: https://tex.stackexchange.com/q/154751/35864. If you did run Biber there should be a .blg file (a simple text file) that logs all warnings and errors. – moewe May 23 '22 at 08:03
  • Not related to the problem, the best way to record BC/BCE dates is to use the date field, and use the -0100 format. For more info see Section 2.3.8 of the Biblatex manual – Guido May 23 '22 at 08:09
  • Ok, so I ran it once with pdfLaTeX, then once with Biber, and then twice with pdfLaTeX. However it doesn't work. When I run it with biber I get the following error: INFO - This is Biber 2.17 INFO - Logfile is 'trial.blg' INFO - Reading 'trial.bcf' ERROR - Error: Found biblatex control file version 3.3, expected version 3.8. This means that your biber (2.17) and biblatex (3.7) versions are incompatible. See compat matrix in biblatex or biber PDF documentation. INFO - ERRORS: 1. I'm using rhe TexWorks IDE. – zest16 May 23 '22 at 08:17
  • Let me guess: are you on MikTeX? If so please update your MikTeX both in MikTeX user mode and in MikTeX admin mode. You seem to have differentiating versions of biber and biblatex, these need to match. – daleif May 23 '22 at 08:47
  • BTW: the editor (here TeXWorks) is irrelevant – daleif May 23 '22 at 08:48
  • No, I'm on TeXLive. – zest16 May 23 '22 at 09:24
  • How did you install TeX live (if you installed via your OS's package manager like apt/apt-get, please mention your OS)? Did you install any packages manually? Do you maybe have several TeX live installations on your machine? – moewe May 23 '22 at 09:57
  • I installed it from here: https://tug.org/texlive/acquire-netinstall.html. My OS is OpenSuse Leap 15.3.. I haven't installed any packages manually. How can I know if I have TeXLive installed more than once? I think I don't. – zest16 May 23 '22 at 10:12
  • By the way after following these steps (https://tex.stackexchange.com/a/84656/120810) the error I get when I run it with biber is: execve: Permission denied. – zest16 May 23 '22 at 10:15
  • Do not follow https://tex.stackexchange.com/a/84656/35864, unless you know exactly what you are doing and why you are doing it. Manual Biber installations do not keep in synch with biblatex and are generally not necessary. See also https://tex.stackexchange.com/a/447539/35864. What do you get when you type which -a tlmgr, which -a pdflatex, which -a biber in the command line? What do you get if you type kpsewhich -all biblatex.sty? – moewe May 23 '22 at 14:57
  • ... The error message says you have Biber 2.17 (which is the current version), but biblatex is at version 3.7 (from December 2016)! It is pretty odd that the biblatex version is so old. It is possible that you don't have several TeX live installations, but a local outdated copy of biblatex.sty somewhere. In addition to the output of the queries from my comment above, can you upload the .log file of the LaTeX run on the example document to a text-sharing site such as https://pastebin.com/ or https://gist.github.com/, please? – moewe May 23 '22 at 15:05
  • This is the content of trial.log: https://pastebin.com/xtZmNmLH – zest16 May 24 '22 at 10:10
  • ~> which -a tlmgr outputs which: no tlmgr in (/home/bscuser/.local/bin:/home/bscuser/bin:/usr/local/bin:/usr/bin:/bin); ~> which -a pdflatex outputs /usr/bin/pdflatex; ~> which -a biber outputs which: no biber in (/home/bscuser/.local/bin:/home/bscuser/bin:/usr/local/bin:/usr/bin:/bin); ~> kpsewhich -all biblatex.sty outputs /usr/share/texmf/tex/latex/biblatex/biblatex.sty. – zest16 May 24 '22 at 10:11
  • Do you remember the location of the TeX system you installed from https://tug.org/texlive/acquire-netinstall.html. From what I can see, the TeX system that is in the PATH is very outdated and does not come with tlmgr indicating it is from your OS package manager. Can you show us a screenshot of your TeXmaker "Commands" settings where you configure all the programs? – moewe May 24 '22 at 14:51
  • I'm not using Texmaker but TeXworks (as far as I understand both are editors). Anyway, under "Configuration and Resources" there's: "Configuration": /home/bscuser/.config/TUG/TeXworks.conf and "Resources": /home/bscuser/.TeXworks/. (https://imgur.com/8aGH2TK). The location of the file I installed from that page is /home/bscuser/Downloads/. – zest16 May 25 '22 at 07:39
  • Ugh, sorry, I got confused with some other post about the editor. Can you show a screenshot of the Texworks preferences, specifically the path information at the top of the "typesetting" tab, please? Did you really install your TeX system into /home/bscuser/Downloads/? Normally, when you install from TUG.org, you get an install script that guides you through the installation and lets you select a installation directory? Did you actually run the script you downloaded? What directory did you tell it to install into? – moewe May 25 '22 at 15:58
  • Screenshot (https://imgur.com/6QbEFtA, "Typesetting", first dropdown: "Path to TeX and related programs", second dropdown: "Typesetting tools"). There is no guide here, and the install-tl-unx.tar.gz is indeed in /home/bscuser/Downloads/. What I did was unpack that directory and follow the instructions under "Running the installer"(https://tug.org/texlive/quickinstall.html). cd /your/unpacked/directory perl install-tl [... messages omitted ...] Enter command: i – zest16 May 26 '22 at 06:58
  • In the "Typesetting" window use the arrows to move up the currently last path /usr/local/texlive/2022/bin/x86_64-linux to the top. Delete all temporary files (.aux, .bbl, .bcf, ...) and compile again. Hopefully that already works. You definitely have two TeX systems. One is probably system installed, but does not include all of TeX Live. You also have the vanilla TeX live from TUG. If you change the PATH settings to prefer the TUG TeX Live we'll hopefully no longer have version mismatches. – moewe May 27 '22 at 13:46

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