Essayez d'éviter un `tikzpicture` dans un autre `tikzpicture`. Pour obtenir un résultat analogue, on peut faire quelque chose comme ça :
\documentclass[a4paper,12pt,
%DIV50
]{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{lmodern}
\usepackage{graphicx}
\usepackage[french]{babel}
\usepackage[]{tikz}
\usetikzlibrary{shapes,positioning}
\begin{document}
\begin{tikzpicture}
\begin{scope}[transform canvas={rotate=20,scale=1.5},yshift=-170,xshift=-100]
\node (A) at (1,0) {$A$};
\node (B) at (5.5,0) {$B$};
\node (C) at (10,0) {$C$};
\draw (A.south west) rectangle (C.north east);
\node[below of = A,node distance=3cm] (A1) {A1};
\node[below of = B,node distance=3cm] (B1) {B1};
\node[below of = C,node distance=3cm] (C1) {C1};
\draw[->] (A.south) -- (A1);
\draw[->] (B.south) -- (B1);
\draw[->] (C.south) -- (C1);
\end{scope}
\end{tikzpicture}
\end{document}
![alt text][1]
<img src="/upfiles/Screen_Shot_2019-07-09_at_10.13.15.png" style="width: 100%;"/>
La même chose plusieurs fois :
\documentclass[a4paper,12pt,
%DIV50
]{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{lmodern}
\usepackage{graphicx}
\usepackage[french]{babel}
\usepackage[]{tikz}
\usetikzlibrary{shapes,positioning}
\newcommand{\foo}{%
\node (A) at (1,0) {$A$};
\node (B) at (5.5,0) {$B$};
\node (C) at (10,0) {$C$};
\draw (A.south west) rectangle (C.north east);
\node[below of = A,node distance=3cm] (A1) {A1};
\node[below of = B,node distance=3cm] (B1) {B1};
\node[below of = C,node distance=3cm] (C1) {C1};
\draw[->] (A.south) -- (A1);
\draw[->] (B.south) -- (B1);
\draw[->] (C.south) -- (C1);
}
\begin{document}
\begin{tikzpicture}
\begin{scope}[transform canvas={rotate=20,scale=1.5},yshift=-170,xshift=-100]
\foo
\end{scope}
\begin{scope}[transform canvas={rotate=-20,scale=1.5},yshift=-100,xshift=-20,red]
\foo
\end{scope}
\end{tikzpicture}
\end{document}
![alt text][2]
[1]: https://texnique.fr/osqa/upfiles/Screen_Shot_2019-07-09_at_10.13.15.png
[2]: https://texnique.fr/osqa/upfiles/Screen_Shot_2019-07-09_at_10.53.16.png
<img src="/upfiles/Screen_Shot_2019-07-09_at_10.53.16.png" style="width: 100%;"/>
