[XeTeX] Undefined control sequence

[Will Robertson]

On 2010-10-03 00:08:20 +0930, Cesar Romani 
<cesar.romani at gmail.com> said:

> I'm using xelatex from TexLive 2008 on Win XP.
> 
> \usepackage{fontspec}
> \usepackage{xunicode}
> \usepackage{xltxtra}
> \usepackage{polyglossia}


I'm afraid your example works correctly for me. There has been some 
development on these packages since 2008; I recommend upgrading your 
distribution if possible. Otherwise, I suspect grabbing the latest 
copies from CTAN and installing them manually will be your best option.

Cheers,
Will