Hi John, This message means that the LaTeX document class needed by the layout is not available. You can install these using the MikTeX package manager. Simply search for the required package name and then click on install. Once you have installed the needed LaTeX packages, then you can reconfigure LyX and things should work.
For more information on how LyX and LaTeX work together, see the first section of this article: http://blog.oak-tree.us/index.php/2009/11/02/custom-lyx-nih The section is entitled, "Understanding the Big Picture". Cheers, Rob On Thu, 2010-06-17 at 18:58 +0100, John O Brien wrote: > Hi, > > I just installed MiKTeX 2.8 and LyX 1.6. Whenever I try to open some > templates in LyX I get the following message: > > "the layout file requested by this document, aa.layout, is not usable. > This is probably because a LaTeXclass or style file required by it is > not available. See the Customization documentationfor more > information. LyX will not be able to produce output." I also get "No > information for exporting the format PDF (pdflatex)." when I try to > view PDF. > > I have seen many suggested fixes online such as reconfiguring LyX but > none have worked. I have installed these on two laptops, one with XP > and one with Windows 7 x64. Same problem on both. I have attached the > textclass.lst if this is any help. > > Any suggestions would be greatly appreciated as I have to get my > thesis started asap. > > Regards, > John O Brien
