Dear José Carlos, No problem here too. If Ulrik' suggestion does not apply in your case I suggest you check if you're using the most recent version of unicode-math. (The last version is dated 2010/09/27).
Best, António Fernandes On Oct 3, 2010, at 10:40 PM, José Carlos Santos wrote: > On 03-10-2010 18:44, António Fernandes wrote: > >> The error goes away if you set a math font using the \setmathfont command >> as in >> >> \setmathfont{Asana Math} > > Many thanks to you and to Khaled. But this creates another problem. If I > compile the file: > > \documentclass{article} > \usepackage[T1]{fontenc} > \usepackage{fontspec} > \usepackage{xltxtra} > \usepackage{unicode-math} > \setmathfont{Asana Math} > \pagestyle{empty} > \begin{document} > $P′$ > \end{document} > > then the PDF file contains Q″ instead of P′. Why is that? Do you have the > same problem? > > Best regards, > > José Carlos Santos > > > -------------------------------------------------- > Subscriptions, Archive, and List information, etc.: > http://tug.org/mailman/listinfo/xetex -------------------------------------------------- Subscriptions, Archive, and List information, etc.: http://tug.org/mailman/listinfo/xetex