[XeTeX] fontspec: Unknown feature `' in font `TeX Gyre Heros'.

[Martin Schröder]

Here's my minimal input:

\listfiles
\documentclass{article}
\usepackage[ngerman,english]{babel}
\usepackage{fontspec}
\setmainfont[Ligatures=TeX]{TeX Gyre Heros}
\setsansfont[Ligatures=TeX]{TeX Gyre Heros}
\begin{document}
A
\end{document}

 *File List*
 article.cls    2007/10/19 v1.4h Standard LaTeX document class
  size10.clo    2007/10/19 v1.4h Standard LaTeX file (size option)
   babel.sty    2008/07/06 v3.8l The Babel package
 bblopts.cfg    2006/07/31 v1.0 MiKTeX 'babel' configuration
ngermanb.ldf    2008/07/06 v2.6n new German support from the babel system
 english.ldf    2005/03/30 v3.3o English support from the babel system
fontspec.sty    2010/11/17 v2.1e Advanced font selection for XeLaTeX/LuaLaTeX
   expl3.sty    2010/11/13 v2083 L3 Experimental code bundle wrapper
 l3names.sty    2010/10/03 v2064 L3 Experimental Naming Scheme for TeX
Primitives
    etex.sty    1998/03/26 v2.0 eTeX basic definition package (PEB)
l3basics.sty    2010/10/03 v2063 L3 Experimental basic definitions
 l3expan.sty    2010/09/20 v2037 L3 Experimental Argument Expansion module
    l3tl.sty    2010/11/17 v2084 L3 Experimental Token Lists
   l3int.sty    2010/10/17 v2077 L3 Experimental Integer module
 l3quark.sty    2010/09/20 v2036 L3 Experimental Quark Commands
   l3seq.sty    2010/03/29 v1879 L3 Experimental sequences and stacks
  l3toks.sty    2010/09/20 v2037 L3 Experimental Token Registers
   l3prg.sty    2010/10/03 v2063 L3 Experimental control structures
 l3clist.sty    2010/10/09 v2071 L3 Experimental comma separated lists
 l3token.sty    2010/10/03 v2063 L3 Experimental token investigation
and manipulation
  l3prop.sty    2010/11/23 v2087 L3 Experimental Property Lists
   l3msg.sty    2010/10/02 v2052 L3 Experimental LaTeX Messages module
    l3io.sty    2010/10/03 v2063 L3 Experimental i/o module
  l3skip.sty    2010/11/23 v2088 L3 Experimental skip registers
   l3box.sty    2010/09/26 v2048 L3 Experimental Box module
l3keyval.sty    2010/04/11 v1890 L3 Experimental keyval processing
  l3keys.sty    2010/11/11 v2082 L3 Experimental key-value support
l3precom.sty    2010/02/09 v1793 L3 Experimental precompilation module
  l3xref.sty    2010/02/09 v1786 L3 Experimental cross referencing
  l3file.sty    2010/03/21 v1853 L3 Experimental file loading
    l3fp.sty    2010/11/25 v2092 L3 Experimental floating-point operations
l3luatex.sty    2010/07/18 v1985 L3 Experimental LuaTeX functions
    calc.sty    2007/08/22 v4.3 Infix arithmetic (KKT,FJ)
  xparse.sty    2010/10/13 v2073 Generic document command parser
 xkeyval.sty    2008/08/13 v2.6a package option processing (HA)
 xkeyval.tex    2008/08/13 v2.6a key=value parser (HA)
fontspec-patches.sty    2010/11/17 v2.1e Advanced font selection for
XeLaTeX/LuaLaTeX
fixltx2e.sty    2006/09/13 v1.1m fixes to LaTeX
 fontenc.sty
  eu1enc.def    2010/05/27 v0.1h Experimental Unicode font encodings
  eu1lmr.fd    2009/10/30 v1.6 Font defs for Latin Modern
xunicode.sty    2010/11/06 v0.96 provides access to latin accents and
many other characters in Unicode lower plane
fontspec.cfg

Best
   Martin