# Re: mathrm

But it compiles? I have tested it out of the box and it does so.
-------------------------------------------------
Julio Rojas
jcredbe...@gmail.com


On Thu, Jan 5, 2012 at 11:39 AM, Wolfgang Engelmann <
engelm...@uni-tuebingen.de> wrote:

> I use
> \mathrm{K}^{+}
> to get an upright K^+ (K-Ion) (and other items such as units)
> and guess the following message on the terminal from which I start lyx has
> to do with it:
>
> [Unknown [sub [mathrm [char E mathalpha]] [char e mathalpha][char x
> mathalpha]]]
>
> Do I have to include some package or use another method?
>
> Wolfgang
>