[XeTeX] MAC OS X 10.8.5 - xdvipdfmx error usexobj (beamer - pgf)

[Federico Tramarin]

Hi all,

I am experiencing a problem with xelatex, with a very simple presentation I
wrote using beamer. It was written on a linux machine, and all is working
well.
Now I am using a mac (last update) with a mactex 2013 base system.
All needed packages are installed.
I get an error relative to the use of pgf shadows. In particular, xelatex
complaints about
** WARNING ** Error locating image file "pgfshadebeamer at headfade"
** WARNING ** Specified (image) object doesn't exist:
pgfshadebeamer at headfade
** WARNING ** Interpreting special command usexobj (pdf:) failed.

I made a lot of testing, but I was not able to solve the issue.

I paste here a small piece of code that reproduce the error in my machine

\documentclass[10pt,compress,svgnames]{beamer}
\usepackage{amsmath}
\usepackage{graphicx}
\graphicspath{{img/}}
\usepackage{xcolor}
\usepackage{booktabs,array}
\usepackage{xltxtra}
\defaultfontfeatures{Scale=MatchLowercase}
\usepackage{polyglossia}
\setmainlanguage{italian}
\usepackage{unicode-math}
\usepackage{pstricks,pst-node,pst-grad}
\psset{linecolor=red}
\newrgbcolor{gradbegin}{0 1 1}

\usetheme{Singapore}

\beamertemplatenumberedballsectiontoc
\setbeamertemplate{navigation symbols}{}
\usecolortheme[RGB={129,24,43}]{structure}
\usefonttheme{structurebold}
\usefonttheme{professionalfonts}
\setbeamercolor{alerted text}{fg=DarkRed}

\setbeamertemplate{footline}{\leavevmode%
\begin{beamercolorbox}[wd=.33\paperwidth,center,ht=2.25ex,dp=1ex%,rightskip=4pt
 plus 1pt%
]{subsection in head/foot}
  \insertshortauthor\ (\insertshortinstitute)
\end{beamercolorbox}%
\begin{beamercolorbox}[wd=.33\paperwidth,center,ht=2.25ex,dp=1ex]{section
in head/foot}
  \usebeamercolor[fg]{section in foot/head}\insertshorttitle
\end{beamercolorbox}%
\begin{beamercolorbox}[wd=.34\paperwidth,ht=2.25ex,dp=1ex,leftskip=10pt
plus 1pt,rightskip=10 pt plus 1pt]{subsection in head/foot}
  \insertshortdate\hfill\insertframenumber/\inserttotalframenumber
\end{beamercolorbox}
}

\setbeamercovered{dynamic}
\setbeamertemplate{itemize items}{$\rightsquigarrow$}
\setbeamertemplate{blocks}[rounded][shadow=true]
\colorlet{LC foreground}{DarkBlue}
\definecolor{LC background}{rgb}{0.941, 0.901, 0.941}
\setbeamercolor{block body}{fg=LC foreground,bg=LC background}
\setbeamercolor{block title}{bg=LC background}

\title[Test title]{Test title}
\author[Name~Surname]{\textbf{Name~Surname}}
\date[\today]{\today}
\institute[University of XXX]{Department of Information Engineering\\
University of XXX, Italy}

\begin{document}
\frame{\titlepage}
\end{document}

The output from xelatex run is:

This is XeTeX, Version 3.1415926-2.5-0.9999.3 (TeX Live 2013)
 restricted \write18 enabled.
entering extended mode
...
** WARNING ** Error locating image file "pgfshadebeamer at headfade"
** WARNING ** Specified (image) object doesn't exist:
pgfshadebeamer at headfade
** WARNING ** Interpreting special command usexobj (pdf:) failed.
** WARNING ** >> at page="1" position="(1.09453e-05, 236.693)" (in PDF)
** WARNING ** >> xxx "pdf: usexobj @pgfshadebeamer at headfade"
...

having stripped the normal logs for other operations.

If I run xelatex -no-pdf, it does not display any complaints in the
production of the xdv file.
However the same warning/error is given by xdvipdfmx.

In practice, the pdf produced does not show the gradient on the background.
Please note that if I add several other pages, they have the correct
background. Only the first page is "corrupted".

Please, is someone able to help me/reproduce this error?
Or simply could you give me some advice on how to solve it?

Best regards to all
Sincerely

F. Tramarin
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://tug.org/pipermail/xetex/attachments/20130917/53bbdfc6/attachment-0001.html>