Thomas Sauter wrote:

Problem of the german version of the path?
I don't think so.  If you open a DOS prompt and run 'set h', what do you
see for your home drive and home directory?

HOMEDRIVE=C:
HOMEPATH=\Dokumente und Einstellungen\sauter

This is fine. (If your home path were on a remote server, it might account for part of the problem.)

This indicates that a packages.lst file was created.  What directory
were you in when you ran configure.py?  Is there a packages.lst file
there now, and, if so, is it empty or not?

I was in
C:\lyx

and typed
c:\lyx14\python\python.exe c:\lyx14\Resources\configure.py

There is a packages.lst file now and it is empty (0 Byte).

The output you quoted from the configure script ended with

+  checking for ec fonts... yes
+  checking for ec support in LaTeX format... yes
+checking for document class IEEEtran [IEEEtran]...
creating packages.lst
creating doc/LaTeXConfig.lyx

Is this everything that the script displayed at the end (nothing cut out)? If so, it suggests that something happened while LyX was looking for LaTeX classes (specifically the IEEEtran class, which I think may be the first it tries to find). Is there a C:\lyx\doc folder containing a file named LaTeXConfig.lyx? If so, you can open it with Notepad or any other text editor or viewer. There should be a section like the following:

\begin_layout Subsection
article
\end_layout

\begin_layout Description
Found: yes
\end_layout

My guess is that yours will say Found: no.

If this is the case, we need to determine why the search for classes is breaking down. MikTeX gives you three options for situations where a document uses a missing class: automatically download; ask permission to download; or fail. You set this in the MikTeX Options program (General tab, package installation). If yours is set to download automatically and you do not have an Internet connection (or MikTeX is set to look at a local repository), I suppose something might go wrong. I leave this set on "Ask permission", and when upgrading LyX I just say 'no' to each request to install a class.

/Paul

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