Hi,
this document with your code (just completed) runs fine without error:
Code: Select all
\documentclass{article}
\usepackage[demo]{graphicx}
\usepackage{float}
\begin{document}
la bla bla \ref{adhaesion_hysterese} bla bla bla.
\begin{figure}[H]
\centering
\includegraphics[width=0.5\linewidth]{Adhaesion_Hysterese_Pic_Name}
\caption{bla bla bla (\textsc{Grosch}{Grosch.1963})}
\label{adhaesion_hysterese}
\end{figure}
\end{document}
It seems that you are doing actually something different, and that copied code snippets don't show it. Perhaps post a full example, reduced to the minimum, that brings the error, as I did here.
Stefan