# RE: Problem with Lyx multirows

>Hi,
>I'm in the process of writing my thesis in Lyx, but I'm pretty new to it. I've
>been having some problems with creating multirows in tables. I tried to follow
>the instructions from >http://wiki.lyx.org/LyX/Tables, but can't get it to
>work in my own lyx document. Whenever I want to watch the PDF view an error
>saying Undefined control sequence pops up with the following >description:
>
>\multirow
>              {2}{2.5cm}{multi row} &  &  &  & \tabularnewline
>The control sequence at the end of the top line
>of your error message was never \def'ed. If you have

You need to declare the multrow package. In Documents->Settings-->Preamble write

\usepackage{multirow}

hth
Ingar