Here is what I tried, following Uwe's response:
  1. I removed all Lyx installations from the XP machine
  2. I downloaded the Windows bundle installer
  3. I installed Lyx and JabRef with that installer
  4. I tested it-- got the very same error (!pdfTeX error: pdflatex.exe (file c:/texlive/2012/texmf-var/fonts/map/pdftex/up)
    when I tried to view a pdf output by clicking on the ViewPdf icon (pdflatex)
  5. Tried other formats-- luapdf failed, but others (xetex, pdf via dvi or PS) all worked.

So I am exactly where I was initially. I rarely use the XP machine these days, but when I need it, I usually need Lyx to function on it, which it did until this latest version.

Any idea what is going on?


On 01/15/2013 08:45 PM, Uwe Stöhr wrote:
Am 09.01.2013 19:00, schrieb EK:

I have installed Lyx 2.05.1 on a Windows XP machine (I still have one of those),
with TexLive.
Everything works fine, but when I click the VIEW icon (to get a pdf) I get an
error about pdflatex and/or pdftex.exe.
If I select View PDF (lua or Xetex) or DVI from the menu everything works just
fine-- just the most useful pdflatex fails (naturally..;-).
I have compared the file converters and paths to a previous (Lyx 2.04)
installation that works perfectly, and I do not see a difference.
Can anyone shed light on this mystery?

There was a bug in the installer that the LaTeX distribution was not correctly or even not recognized on Windows 7 and 8 in the 64bit versions. If that is your OS, please reinstall LyX using the fixed installer:
(will be soon on too)

Can you please report back if the installer found the correct path to TeXLive? if not, what version of TeXLive are you using? Note that the installer can only support TeXLive 2012 and no older versions because of technical limitations in the old versions.
If you have a older TeXLive, please try to update it before you reinstall LyX. If this is not possible, please reinstall LyX anyway and then go to the LyX preferences and adapt the paths so that the path list contains the folder of TeXLive where the latex.exe is located.

If the problem persists anyway for you, can you please tell me your program versions (Windows, TeXLive) and provide a _minimal_ LyX file you are using.

thanks and regards

Ehud Kaplan, Ph.D.
Jules and Doris Stein Research to Prevent Blindness Professor
Director, The laboratory of Visual & Computational Neuroscience
Director, Center for Excellence in Computational & Systems Neuroscience
Friedman Brain Institute
Departments of Neuroscience, Ophthalmology, Structural & Chemical Biology,
The Ichan school of medicine at Mount Sinai
One Gustave Levy Place,
NY, NY, 10029

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