\documentclass[ngerman,12pt,parskip=half,final,listof=totoc,bibt
o tocnumbered,captions=tableheading]{scrreprt}
\usepackage{babel}
\usepackage[latin1]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{graphicx}
\usepackage{array}
\usepackage{pdfpages}
\usepackage{subfigure}
\usepackage{rotating}
\usepackage[intoc]{nomencl}
\usepackage{tocstyle}
\usetocstyle{allwithdot}
\usepackage[a4paper,left=40mm, right=25mm, top=30mm, bottom=20mm,]{geometry}
\usepackage{cite}
\usepackage{setspace}
\onehalfspacing
\usepackage{amsmath, amsthm, amssymb}
\usepackage{mathtools}
\usepackage{booktabs}
\usepackage{scrpage2}
\usepackage{ifthen}
\clearscrheadings
\setheadsepline{0.4pt}
\pagestyle{scrheadings}
\automark[chapter]{section}
\ihead{\headmark}
\setlength{\headheight}{1.1\baselineskip}
\renewcommand{\chapterpagestyle}{scrheadings}
\usepackage{blindtext}
\usepackage{filecontents}
\renewcommand*{\chapterheadstartvskip}{\vspace*{-\topskip}}
\let\abk\nomenclature
\renewcommand{\nomname}{Abkürzungsverzeichnis}
\setlength{\nomlabelwidth}{0.5\hsize}
\renewcommand{\nomlabel}[1]{#1\dotfill}
\setlength{\nomitemsep}{-\parsep}
\makenomenclature
\begin{document}
\clearpage
\ohead{\pagemark}
\clearpage\pagenumbering{Roman}
\tableofcontents
\clearpage\markboth{Abkürzungsverzeichnis}{Abkürzu ngsverzeichnis}
\printnomenclature
%ABkürzungen
\abk{VDI}{Verein deutscher Ingenieure}
\abk{XYZ}{abcde}
\renewcommand{\nomname}{Symbolverzeichnis}
\newcommand{\nomunit}[1]{\renewcommand{\nomentryend}{\hspace*{\fill}#1\par box{3cm}{\hspace*{3cm}}}}
\renewcommand{\nompreamble}{\parbox{115mm}{\large\ textbf{Symbol}}\parbox{3cm}{\large\textbf{Einheit} }\newline\rule{1\textwidth}{0pt}}
\setlength{\nomitemsep}{0.5\parsep}
\clearpage\markboth{Symbolverzeichnis}{Symbolverze ichnis}
\printnomenclature
\listoffigures
\listoftables
\clearpage\pagenumbering{arabic}
\chapter{Einleitung}
\end{document}rad}}
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