I'm currently swapping from pdfLaTeX to XeLaTeX and everything works quite smoothly. Unfortunately, there seems to be a problem with my biber on TeXmaker. I need a quite extensively changed bibliography due to my university's prerequesites:
\usepackage[nottoc,notlot,notlof]{tocbibind}
\usepackage[backend=biber,style=authoryear,sorting=nyt]{biblatex}
\addbibresource{Bibliography.bib}
\DefineBibliographyStrings{german}{references={Bibliographie}}
\DeclareFieldFormat{superedition}{\textsuperscript{#1}}
\DeclareNameAlias{sortname}{last-first}
\renewbibmacro*{date+extrayear}{%
\iffieldundef{\thefield{datelabelsource}year}%
{}{%
\printtext[parens]{%
\iffieldnum{edition}{\printfield[superedition]{edition}\global\clearfield{edition}}{}%
\iffieldsequal{year}{\thefield{datelabelsource}year}%
{\printdateextralabel}{\printfield{labelyear}\printfield{extrayear}}%
}%
}%
}
\renewcommand*{\bibpagespunct}{\addcomma\space}
\DeclareFieldFormat{pages}{#1}
\DeclareFieldFormat{editortype}{\mkbibparens{#1}}
\renewbibmacro*{byeditor+others}{%
\ifnameundef{editor}
{}{%
\printnames[byeditor]{editor}%
\setunit{\addspace}%
\usebibmacro{byeditor+othersstrg}%
\clearname{editor}\newunit%
}%
\usebibmacro{byeditorx}%
\usebibmacro{bytranslator+others}%
}
\renewbibmacro*{byeditor+othersstrg}{\usebibmacro{editor+othersstrg}}
\renewbibmacro*{bytranslator+othersstrg}{\usebibmacro{translator+othersstrg}}
\renewbibmacro*{bytypestrg}[2]{%
\iffieldundef{#1type}{\bibstring{#2}}{%
\ifbibxstring{\thefield{#1type}}%
{\bibstring{\thefield{#1type}}}{\printtext{\thefield{#1type}}}%
}%
}
\renewcommand*{\multinamedelim}{/}
\renewcommand*{\finalnamedelim}{/}
\renewcommand*{\postnotedelim}{\addcolon\space}
\DeclareFieldFormat{postnote}{#1}
\DeclareFieldFormat{multipostnote}{#1}
@Book{coseriu1992,
Title = {Einführung in die Allgemeine Sprachwissenschaft \textup{(Uni-Taschenbücher 1372)}},
Author = {Coseriu, Eugenio},
Location = {Tübingen},
Publisher = {Francke},
Year = {1992},
Edition = {2},
}
\begin{document}
\tableofcontents
\newpage
Blub\parencite[cf.][9]{coseriu1992}
\newpage
\printbibliography[heading=bibintoc]
\end{document}
It should still be produce the same outpout as through pdfLaTeX but all I get is this error message:
This is BibTeX, Version 0.99d (TeX Live 2017/TeX Live for SUSE Linux) The top-level auxiliary file: KonSysRum.aux I found no \citation commands---while reading file KonSysRum.aux I found no \bibdata command---while reading file KonSysRum.aux I found no \bibstyle command---while reading file KonSysRum.aux
I've already tried to change the {ngerman} to {german} because I think {ngerman} is part of babel, I've changed the way I quote from mostly \parencite* to just \cite and I've deleted the .aux-file but nothing changes. My .aux-file really does not contain the three commands from the error message...

\documentclassand ending with\end{document}. – Bobyandbob Aug 13 '17 at 07:16I'll update the question and add a MWE
– LajosH Aug 18 '17 at 12:31\documentclass. It would also be helpful to show us the output you get. It would also help if you could explain what error TeXstudio reports. – moewe Aug 18 '17 at 12:45.bibentry in the file. See https://tex.meta.stackexchange.com/q/4407/35864 – moewe Aug 18 '17 at 12:54\printdateextralabelis undefined, it was renamed a few versions back. – moewe Aug 18 '17 at 14:10.logand the unexpected output). That way people will not get confused (like I did) by the two-layered nature of your problem. – moewe Aug 18 '17 at 14:16