TikZ matrix in TikZPoster

Question

Using a TikZ matrix in a TikZPoster does not work.

Here is an MWE:

\documentclass{tikzposter}
\usetikzlibrary{matrix}

\begin{document}
\block{Some title}{
    \begin{tikzpicture}
        \matrix [matrix of nodes] {
            A & B \\
        };
    \end{tikzpicture}
}
\end{document}

It gives the error

! Undefined control sequence.
<argument> \pgf@matrix@last@nextcell@options 

Any suggestions for a workaround?

Answer 1

You have to use ampersand replacement=\& as argument for tikzpicture and replace all & with \&

MWE

\documentclass{tikzposter}
\usetikzlibrary{matrix}

\begin{document}
\block{Some title}{%
    \begin{tikzpicture}[ampersand replacement=\&]
        \matrix [matrix of nodes] {
            A \& B \\
        };
    \end{tikzpicture}
}
\end{document} 

Output