[XeTeX] problem with \XeTeXglyph\XeTeXglyphindex

[M. Niedermair]

Hi,

i use the font linuxlibertine and i want to use the glyphs "Tux" and 
"uniE00A".

% ----------------------------------------------
\documentclass{article}

\usepackage{xunicode}
\usepackage{fontspec}
\usepackage{xltxtra}
\setromanfont[Mapping=tex-text]{Linux Libertine O}

\def\charGlyphname#1{\XeTeXglyph\XeTeXglyphindex "#1"}

\usepackage[ngerman]{babel}

\begin{document}

\charGlyphname{Tux}
%\charGlyphname{uniE00A}

\end{document}
% ----------------------------------------------

If i only use "Tux", it works. If i use "uniE00A" in addition, i get no 
pdf file.

in the log i see:
[...]
(/home/mgn/daten/sv/libertine/target/tex/test05.aux) )
Here is how much of TeX's memory you used:
  5130 strings out of 94860
  80138 string characters out of 1173398
  160177 words of memory out of 5000000
  8302 multiletter control sequences out of 10000+50000
  3696 words of font info for 21 fonts, out of 2000000 for 2000
  605 hyphenation exceptions out of 8191
  33i,4n,43p,316b,205s stack positions out of 
5000i,500n,6000p,200000b,10000s

Output written on test05.pdf (1 page).

but on the screen i see:
[...]
Output file removed.
Output written on test05.pdf (1 page).
Transcript written on /home/mgn/daten/sv/libertine/target/tex/test05.log.

I open the otf-file with fontforge and see the two glyphs.

What is wrong?

By
Michael