[XeTeX] problem with fontspec

[Yves Codet]

Hello.

I've updated fontspec to v2.1e through tlmgr and my documents don't compile anymore. With the following:

\documentclass{article}
\usepackage{fontspec}
\setmainfont{Charis SIL}
\begin{document}
Essai.
\end{document}

I get this error message:

./essai.tex:3: Undefined control sequence.
<argument> \int_compare_p:nNn 
                              
l.3 \setmainfont{Charis SIL}
                            
? 

Is anything wrong with my setup? Thanks in advance.

Regards,

Yves

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