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No ideas anybody?

Hi,
thanks for the reply and the welcome!
Here is the complete example:

\documentclass{article}

\usepackage{graphicx}
\usepackage{epstopdf}
\usepackage{gnuplottex}

\begin{document}

\newenvironment{gnu}[1]{
\begin{figure}[!ht]
\caption{#1}
\begin{gnuplot}[terminal=epslatex,terminaloptions ...

I try to create a new environment for gnuplot, where the figure-command and captions and so on are included.

\newenvironment{gnu}[1]{
\begin{figure}[!ht]
\caption{#1}
\begin{gnuplot}[terminal=epslatex,terminaloptions=color solid]
}{
\end{gnuplot}
\end{figure}
}


\begin{gnu}{1}
plot cos(x ...