Alternative to auto-pst-pdf for chemnum

Question

Does anyone know what I could use instead of auto-pst-pdf combined with chemnum to replace tags in eps-files? Since this week it doesn't work anymore. Pstool (\usepackage[mode=nonstop,crossref=true,crop=pdfcrop, process=all]{pstool}) works halfway, but can't replace tags. Im currently using \usepackage[runs=2, crop=off, cleanup=]{auto-pst-pdf} and I'm getting a Ghostscript error.

\documentclass[ ngerman,11pt,
                paper=a4,
                listsfo=totoc,
                bibliography=totocnumbered,
                parskip=half,
                twoside=true,
                ]{scrbook}
\usepackage[onehalfspacing]{setspace}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[german]{babel}

\usepackage{lmodern}

\usepackage{libertine}

\usepackage{enumerate}
\usepackage{

    caption,

    graphicx,

    wrapfig,

}
\usepackage{chemcompounds} 
\usepackage{bpchem}
\usepackage{chemnum}
\usepackage[version=4]{mhchem}
\newcommand{\CNfig}[1]{\sffamily{\CNref{#1}}}
\usepackage{chemgreek}
\usepackage{psfrag}
\usepackage[runs=2,crop=off,cleanup=]{auto-pst-pdf}
\begin{document}
plain text
\begin{figure}
\replacecmpd[tag=TMP1]{1}
   \includegraphics{pic.eps}
\end{figure}
plain text with \cmpd{1}
\end{document}