[Tex/LaTex] Problems with amsmath

Question

This is my premble to a document and I always get the error LaTeX Error: C
ommand \iint already defined.

\RequirePackage{fix-cm}
%
\documentclass{svjour3}                     % onecolumn (standard format)
%
%\smartqed  % flush right qed marks, e.g. at end of proof
%
\usepackage{graphicx}
\usepackage{hyperref}
\usepackage{caption}
\usepackage{array}
\usepackage{xfrac}
\usepackage{enumitem}
\usepackage{wasysym}
\usepackage{multirow}
\usepackage{amsmath}`

What can I do? Where is the conflict?

Answer 1

The package wasysym should be loaded after amsmath and be passed the option nointegrals (unless you really want the multiple integral symbols in wasysym to take over).

\RequirePackage{fix-cm}
%
\documentclass{svjour3}                     % onecolumn (standard format)
%
%\smartqed  % flush right qed marks, e.g. at end of proof
%
\usepackage{graphicx}
\usepackage{caption}
\usepackage{array}
\usepackage{xfrac}
\usepackage{enumitem}
\usepackage{multirow}
\usepackage{amsmath}
\usepackage[nointegrals]{wasysym}
\usepackage{hyperref}

Note that hyperref should be loaded last.

From the manual of wasysym:

Actually, the loading order is relevant, as you discovered.