On 11/26/2011 07:51 PM, Màxim Carlavilla Márquez wrote:
> Hi, I'm a new user of LyX. I use Windows XP and LyX version 2.0.0.
>
> When trying to use \underset or \overset (for instance,
> \underset{\lim}{t} both with the command in latex and using the button
> in the frame decorations menu), I get the following error message:
>
> $\underset
>
> {t}{\lim}$
>
> 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.
>
>
> I'm sorry but I don't understand the message. I have also the same
> problem with the \overset, \underrightarrow and the \underleftarrow,
> \underleftrightarrow commands too, but the rest of frame decorations
> seem to work fine.
>
Please check Document>Settings>Math Options, and make sure "Use AMS math
package automatically" is checked.Richard
