Hallo Latex-Communitity,
ich habe eine Grafik mit TikZ angefertigt (siehe Anhang). Es hat alles fehlerfrei funktioniert, bis zu dem Zeitpunkt, wo ich im selben Editor (TexStudio) ein anderes Projekt geöffnet und kompilieren lassen habe. Als ich danach erneut meine Graik kompilieren lassen wollte, warf TexStudio folgende Fehlermeldung aus:
! Package ifluatex Error: Name clash, \ifluatex is already defined.
Hier ist der Latex-Code meiner Grafik:
\documentclass[landscape]{article}
\usepackage[a4paper, left=.5cm, right=.5cm, top=.5cm, bottom=.5cm]{geometry}
\usepackage{fontspec}
\usepackage{tikz}
\usepackage{hyperref}
\pgfdeclarelayer{background}
\pgfdeclarelayer{foreground}
\pgfsetlayers{background,main,foreground}
\usetikzlibrary{positioning}
\usetikzlibrary{arrows}
\usetikzlibrary{arrows.meta}
\begin{document}
\sffamily
\begin{figure}[!h]
\centering
\begin{tikzpicture}[
Label/.style={text width=2cm , font=\huge ,align= center},
Point/.style={shape=circle,font=\huge,draw=yellow!80,fill=yellow!50,thick,node distance=0mm, minimum size=1cm},
coordinate_point/.style={shape=circle,draw=red!80,fill=red!80,thick,}
]
\begin{pgfonlayer}{background}
\draw [color=black!70] (-12,-8) grid (12,8);
\end{pgfonlayer}{background}
\coordinate[coordinate_point] (centerpoint) at (0,0);
\coordinate[coordinate_point] (left_bottom) at (-12,-8);
\coordinate[coordinate_point] (top_right) at (12,8);
%Alice-Seite
\node(Alice)[scale=3] at (-10,2) {\includegraphics{icons/alice}};
\node(pub_key_left)[scale=1.4] at (-10,-1) {\includegraphics{icons/public_key}};
\node(priv_key_left)[scale=1.4] at (-8,-1) {\includegraphics{icons/private_key}};
\node(send_message) at (-4,2) {\includegraphics{icons/message_and_signature}};
\node(original_message)[below=of priv_key_left] {\includegraphics{icons/message_normal}};
\node(original_hashed)at (-8,-8) {\includegraphics{icons/message_hashed}};
\node(signature)[scale=0.8] at (-3.5, -4) {\includegraphics{icons/signature}};
%Bob-Seite
\node(Bob)[scale=2] at (10,2) {\includegraphics{icons/bob}};
\node(pub_key_right)[scale=1.4] at (10,-1) {\includegraphics{icons/public_key}};
\node(acceptance_message) at (4,2.2) {\includegraphics{icons/message_encrypt}};
\node(acceptance_signature)[scale=0.8] at (4.4,0.5) {\includegraphics{icons/signature}};
\node(bobs_hash_rigged) at (4,-6) {\includegraphics{icons/message_hashed_rigged}};
\node(bobs_hash) at (8,-6) {\includegraphics{icons/message_hashed}};
\begin{pgfonlayer}{background}
\draw [->,arrows={-Triangle[angle=90:10pt,fill=black]},name=hash_arrow] (original_message.south) --node(Point2)[midway,Point] {2} (original_hashed.north);
\draw [->,arrows={-Triangle[angle=90:10pt,fill=black]}] (priv_key_left) to [out=0,in=90] (signature);
\draw [->,arrows={-Triangle[angle=90:10pt,fill=black]}] (original_hashed) to [out=0,in=270] (signature);
\draw [->,arrows={-Triangle[angle=90:10pt,fill=black]}] (signature) to [out=0,in=0] (send_message);
\draw [->,arrows={-Triangle[angle=90:10pt,fill=black]}] (original_message.north) -- (send_message.west);
\draw [] (acceptance_signature.east) .. controls (5.5,-2.5) and (5.5,-2.8) .. (8,-3);
\draw [] (pub_key_right.west) .. controls (9,-2.8) .. (8,-3);
\draw [->,arrows={-Triangle[angle=90:10pt,fill=black]}] (8,-3) to [out=270,in=90] node(Point8)[midway,Point] {8}(bobs_hash);
\draw [->,arrows={-Triangle[angle=90:10pt,fill=black]},rounded corners=50pt] (send_message.north) -- (-4,5)--node(Point6)[midway,Point] {6}(4,5) --(acceptance_message.north);
\draw [->,arrows={-Triangle[angle=90:10pt,fill=black]}] (acceptance_message) to [out=180,in=180] node(Point7)[midway,Point] {7}(bobs_hash_rigged);
\draw [->, rounded corners=50pt,arrows={-Triangle[angle=90:10pt,fill=black]}] (pub_key_left.south) -- (-10,-9) --node(Point5)[midway,Point] {5} (10,-9) -- (pub_key_right.south);
\end{pgfonlayer}
%Points
\node[left=of pub_key_left,Point](Point1){1};
\node[left=0.1of signature,Point](Point3){3};
\node[above left=0.1of send_message,Point](Point4){4};
\node[Point](Point9) at (6,-7){9};
\end{tikzpicture}
\end{figure}
\end{document}