[XeTeX] Prime + Unicode-math

[Khaled Hosny]

On Sun, Oct 03, 2010 at 06:26:51PM +0100, José Carlos Santos wrote:
> Hi all,
> 
> If I compile this file:
> 
> \documentclass{article}
> \usepackage{fontspec}
> \usepackage{xltxtra}
> \usepackage{unicode-math}
> \begin{document}
> $P'$
> \end{document}
> 
> I get this error message:
> 
> ! Undefined control sequence.
> <argument> \um_prime_single_mchar
> 
> l.6 $P'$

You need to use a Unicode math font as well, TeXLive have XITS and
Asana Math. There is no point in loading unicode-math without using a
Unicode math font. I thin unicode-math package should handle this
though, like issuing a warning or something.

-- 
 Khaled Hosny
 Arabic localiser and member of Arabeyes.org team
 Free font developer