There seems to be an incompatibility between the svjour3 document class for Springer journals and the microtype package. Minimal example:
\documentclass{svjour3}
\usepackage{microtype}
\begin{document}
\end{document}
This results in 90 lines of the form
(\end occurred when \ifx on line 63 was incomplete)
being written to standard out.
Is there any workaround?
The size option file of the class (svjour3.clo) defines the font sizes \normalsize, \small and \footnotesize so that they contain two \ifs. E.g. :
\renewcommand\normalsize{%
\if@twocolumn
\@setfontsize\normalsize\@xpt{12.5pt}%
\else
\if@smallext
\@setfontsize\normalsize\@xpt\@xiipt
\else
\@setfontsize\normalsize{9.5pt}{11.5pt}%
\fi
\fi
\abovedisplayskip=3 mm plus6pt minus 4pt
\belowdisplayskip=3 mm plus6pt minus 4pt
\abovedisplayshortskip=0.0 mm plus6pt
\belowdisplayshortskip=2 mm plus4pt minus 4pt
\let\@listi\@listI}
That's rather unusual and it obviously confuse microtype. I don't understand why they put the if-switches in the font definitions - I doubt that they want to switch the sizes inside a document. Perhaps they only want to avoid to have to copy the \abovedisplayskip part around.
You will have to rearrange the definitions:
\documentclass{svjour3}
\makeatletter
\if@twocolumn
\renewcommand\normalsize{%
\@setfontsize\normalsize\@xpt{12.5pt}%
\abovedisplayskip=3 mm plus6pt minus 4pt
\belowdisplayskip=3 mm plus6pt minus 4pt
\abovedisplayshortskip=0.0 mm plus6pt
\belowdisplayshortskip=2 mm plus4pt minus 4pt
\let\@listi\@listI}%
\renewcommand\small{%
\@setfontsize\small{8.5pt}\@xpt
\abovedisplayskip 8.5\p@ \@plus3\p@ \@minus4\p@
\abovedisplayshortskip \z@ \@plus2\p@
\belowdisplayshortskip 4\p@ \@plus2\p@ \@minus2\p@
\def\@listi{\leftmargin\leftmargini
\parsep 0\p@ \@plus1\p@ \@minus\p@
\topsep 4\p@ \@plus2\p@ \@minus4\p@
\itemsep0\p@}%
\belowdisplayskip \abovedisplayskip}
\else
\if@smallext
\renewcommand\normalsize{%
\@setfontsize\normalsize\@xpt\@xiipt
\abovedisplayskip=3 mm plus6pt minus 4pt
\belowdisplayskip=3 mm plus6pt minus 4pt
\abovedisplayshortskip=0.0 mm plus6pt
\belowdisplayshortskip=2 mm plus4pt minus 4pt
\let\@listi\@listI}%
\renewcommand\small{%
\@setfontsize\small\@viiipt{9.5pt}%
\abovedisplayskip 8.5\p@ \@plus3\p@ \@minus4\p@
\abovedisplayshortskip \z@ \@plus2\p@
\belowdisplayshortskip 4\p@ \@plus2\p@ \@minus2\p@
\def\@listi{\leftmargin\leftmargini
\parsep 0\p@ \@plus1\p@ \@minus\p@
\topsep 4\p@ \@plus2\p@ \@minus4\p@
\itemsep0\p@}%
\belowdisplayskip \abovedisplayskip}
\else
\renewcommand\normalsize{%
\@setfontsize\normalsize{9.5pt}{11.5pt}%
\abovedisplayskip=3 mm plus6pt minus 4pt
\belowdisplayskip=3 mm plus6pt minus 4pt
\abovedisplayshortskip=0.0 mm plus6pt
\belowdisplayshortskip=2 mm plus4pt minus 4pt
\let\@listi\@listI}%
\renewcommand\small{%
\@setfontsize\small\@viiipt{9.25pt}%
\abovedisplayskip 8.5\p@ \@plus3\p@ \@minus4\p@
\abovedisplayshortskip \z@ \@plus2\p@
\belowdisplayshortskip 4\p@ \@plus2\p@ \@minus2\p@
\def\@listi{\leftmargin\leftmargini
\parsep 0\p@ \@plus1\p@ \@minus\p@
\topsep 4\p@ \@plus2\p@ \@minus4\p@
\itemsep0\p@}%
\belowdisplayskip \abovedisplayskip}
\fi
\fi
\let\footnotesize\small
\makeatother
\usepackage{microtype}
\begin{document}
abc
\end{document}
glov3-fix option to the document class which loads mine instead.