I would like to set-up TeXstudio so that Biber is compiling my biblatex bibliography which I exported from Citavi. Unfortunately Biber always looks for a Bibtex formated *.bib file.
Example
\documentclass[
paper=a5,
twoside=on,
DIV=calc,
fontsize=10pt,
BCOR=15.0mm,
parskip=half,
cleardoublepage=empty,
headsepline
]
{scrbook}
\usepackage[utf8]{luainputenc}
\usepackage[T1]{fontenc}
\usepackage[ngerman,english]{babel}
% BIBLIOGRAPHY
\usepackage[autostyle=true,german=quotes,english=british]{csquotes}
\usepackage[backend=biber,style=authoryear,natbib=true,doi=true,]{biblatex}
\addbibresource{refrences}
\begin{document}
This and that~\cite{Umwel.2013}
\include{content/appendix/bibliography}
\end{document}
Biber Log
Prozess gestartet: biber.exe "main"
INFO - This is Biber 2.16
INFO - Logfile is 'main.blg'
INFO - Reading 'main.bcf'
INFO - Found 4 citekeys in bib section 0
INFO - Processing section 0
INFO - Looking for bibtex format file 'refrences' for section 0
ERROR - Cannot find 'refrences'!
INFO - ERRORS: 1
Prozess endete mit Fehler(n)
TeXstudio Settings
Question
I think something is still not correct with my enviroment settings or there are still problems with privileges admin vs user, but I don't know where to look at. I also checked of course that the file refrences.bib is available in the same folder and level as my main.tex. Can you please help me?


\addbibresourceneeds the.bibfile extension is mentioned in many answer, quite prominently in https://tex.stackexchange.com/q/21439/35864 for example, but I did not manage to find a question that focuses solely on this.) – moewe Jun 18 '21 at 14:57Looking for bibtex format file 'refrences' for section 0actually means that Biber is looking for a.bibfile and not a different type of file format it supports (.biblatexml). The "format" might be a bit confusing here. Note also that while there is a difference between BibTeX andbiblatexthe file format for.bibfiles is usually still called BibTeX no matter if you use it with BibTeX orbiblatex. – moewe Jun 19 '21 at 09:49