I am writing in TexStudio and it builds PdfLatex if I don't include the printbibliography command. But when I include it, it shows printbibliography as an unrecognized command and I don't get Bibliography page into my pdf output.
I have also tried compiling the .bib file (as it was working few days ago) with just one citation, before I actually use the mentioned citation into my .tex file but it does not compile (see the image of an error). I think as I can't compile .bib file, I'm not getting bibliography into the pdf output. Any suggestion? 
\usepackage[ backend=biber,
style=numeric,
sortlocale=de_DE,
natbib=true,
url=true,
doi=true,
eprint=false
] {biblatex}
\addbibresource{literatur.bib}
% Biblatex Kompatibilität
\usepackage{csquotes}
\begin{document}
\include{inhalt/01-Introduction}
\include{inhalt/02-CHP_systems}
\listoftables
\printbibliography
\begin{appendix}
\include{Appendix}
\end{appendix}
\end{document}
\printbibliographycommand. the information associated with this question might help: Undefined control sequence\printbibliography. – barbara beeton Sep 28 '16 at 18:39\printbibliographyinstruction first. It's almost certainly not needed. You do have a\bibliography{<name of bib file>}instruction somewhere in the document, likely at the very end, right? – Mico Sep 28 '16 at 19:16tools->commands->pdflatex, then from the same menubiber, two timespdflatexand thentools->view. – samcarter_is_at_topanswers.xyz Sep 28 '16 at 21:07\bibliography{literatur}instead of\addbibresource– samcarter_is_at_topanswers.xyz Sep 28 '16 at 21:09&somewhere in the .bib which should be a\&. BUt can also be another error somewhere. – samcarter_is_at_topanswers.xyz Sep 28 '16 at 21:26{appendix}! It is a macro and should be\appendix. – Tobi Sep 28 '16 at 21:30