LaTeX Forum

\documentclass[10pt,a4paper]{article}
\usepackage[latin1]{inputenc}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{graphicx}
\title{test}
\begin{document}
	\bibliographystyle{unsrtdin}
	\cite{Eichler}
	\bibliography{BA thesis}
\end{document}

Prozess gestartet: bibtex.exe "test"

This is BibTeX, Version 0.99d (MiKTeX 2.9.6300 64-bit)
The top-level auxiliary file: test.aux
The style file: unsrtdin.bst
White space in argument---line 4 of file test.aux
 : \bibdata{BA
 :             thesis}
I'm skipping whatever remains of this command
I found no database files---while reading file test.aux
Warning--I didn't find a database entry for "Eichler"
(There were 2 error messages)

Prozess endete mit Fehler(n)

White space in argument---line 4 of file test.aux
 : \bibdata{BA
 :             thesis}