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Hi,
This is a short example :

\documentclass {report}

\usepackage{txfonts}
\usepackage{lmodern}
\usepackage{graphicx}
\DeclareGraphicsExtensions{.eps}
\usepackage{float}
\usepackage[citeonce(document)]{footbib}

\usepackage{achemso}

\usepackage{multirow}
\usepackage{mciteplus}

\usepackage ...

Hi,
I m trying to use the achemso package for my citations. I had no problem in the past but I just updated my MiKTeX and TeXnicCenter and now, I get this error :
"Warning--I didn't find a database entry for "achemso-control"".
I have read that it could come from a bad installation of the achemso ...