I've just discovered this problem myself after an update from LyX 1.6.4 to
1.6.5
But what I can't fathom is this. The .layout files are quite clearly part of
the default installation and quite clearly belong to the great swathe of
unavailable classes seen on the documents settings.
A lot of these classes are supplied by publishers. We only include the
layout files for those classes to ease the use of them. It's not our
task to distribute third-party classes.
So, if you want to use svmono.layout you need to download the class file
from the Springer website:
ftp://ftp.springer.de/pub/tex/latex/svmonogl/styles/svmono.cls
I install this file in the directory:
C:\Program Files\MiKTeX 2.7\tex\latex\svmono (don't know whether that's
the best place)
Then, you start MiKTeX Settings and choose to refresh the file name
database (FNDB).
After that you can Reconfigure LyX with Tools->Reconfigure.
Now you can use the "book (Springer svmono)" document class and the
template.
I haven't seen this happen before and I am unhappy about it.
In that case, I would suggest to use a document class which is available.
I do wish someone else could explain this,
wurmglow
Vincent