Why is the “layout” option for the geometry package undefined?

Question

I am having problem while using layout options with geometry package, I cannot seem to compile the .tex file.

With the following code :

\documentclass{article}
\usepackage{geometry}
\usepackage[T1]{fontenc}
\geometry{paperwidth=10in,paperheight=6in,layout=a6paper}
\usepackage{lipsum}

\begin{document}
\lipsum[1-10]
\end{document}

I am getting this error when compiling .tex with pdflatex

! Package keyval Error: layout undefined.

1. Please help me resolve this problem?
2. And how do I check if all options in the package are working.

I am using MikTeX 2.8 on Windows XP and WinEdt IDE.

Answer 1

Comparing the obsolete geometry v4.2 manual with the manual of the current version 5.6, it seems that the layout package option was introduced in version 5 (which was a major upgrade). Update your TeX distribution in order to get the current version of geometry, and everything should be fine. (I compiled your example, and it worked without problem.)

EDIT: Here are the links to: 1. Latest version of geometry for manual install; 2. MiKTeX 2.9 for TeX distribution upgrade; 3. TeX Live 2011 for TeX distribution change.