[XeTeX] Problem with Polyglossia's \aemph command

[Vafa Khalighi]

>
> On the attached minimal example I get the following error when I use the
> Polyglossia command \aemph to place an overline over text.
>
> >* ! Undefined control sequence.
> *>* \aemph #1->$\overline {\hboxR
> *>*                               {#1}}$
> *>* l.6 ܗܢܐ ܛܣܛ: \aemph{ܫܠܡܐ}
> *>*
> *>* The control sequence at the end of the top line
> *>* of your error message was never \def'ed. If you have
> *>* misspelled it (e.g., `\hobx'), type `I' and the correct
> *>* spelling (e.g., `I\hbox'). Otherwise just continue,
> *>* and I'll forget about whatever was undefined.
> *>*
> *>* Missing character: There is no ܫ in font cmmi10!
> *>* Missing character: There is no ܠ in font cmmi10!
> *>* Missing character: There is no ܡ in font cmmi10!
> *>* Missing character: There is no ܐ in font cmmi10!
> *
> Why can't I get this work?
>
> The control sequence \hboxR is undefined which means you have an old
version of the bidi package. Update your bidi to the latest version
(v1.1.4c).


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