Thank you Scott for your answer. Indeed, I forgot to remove the code from the preamble, sorry for that. Moreover, since you told me that ERT and relative paths could be the key, I removed the "\includegraphics"and replaced them include the graphics with its Lyx version through Insert / Graphics, and it worked under Windows.
To conclude, relative paths in ERT work correctly with Linux, not with Windows, which is somewhat related to the bug http://www.lyx.org/trac/ticket/1751 Gilles _______________________ Gilles Moyse Mobile : +33 6 38 03 71 63 On 14 July 2015 at 23:47, Scott Kostyshak <skost...@lyx.org> wrote: > On Tue, Jul 14, 2015 at 11:11 AM, Gilles Moyse <gilles.mo...@gmail.com> > wrote: > > > > Dear all, > > > > I ran into a strange problem today. A Beamer file I often use for my > > presentation does not compile any more on my Windows machine since Lyx > > (v2.1.3) says it cannot find the graphic files I use for the logo. Moving > > them to the .lyx file directory doe not fix the problem, but commenting > the > > \logo instruction does. > > > > The strange thing is that the same file compiles correctly on my Linux > > machine with Lyx 2.1.3 at the lab. > > > > The even stranger thing is that using File / Export / Latex (pfdLatex) > on my > > Windows machine and then running "pdfLatex test.tex" works correctly! > > > > It must be a silly mistake but I cannot find it. I attached the files > needed > > to replay : > > > > Test.lyx file working correctly on my Linux machine, not on my Windows > one > > Test.tex generated from .lyx on my Windows machine > > Test.pdf generated from .tex > > upmc.pdf and lip6.pdf are the 2 graphics file not found when compiling > from > > Lyx on my Windows machine - they must be located relatively to the lyx > file > > in a subdirectory called "res" > > Hi Giles, > > I did not try your example because it is far from a minimal example > (see http://wiki.lyx.org/FAQ/MinimalExample). However, I see that you > use ERT. In this case, you must give the full path to the files, > because LyX does not know about them and thus won't copy them to the > temporary directory. > > Does using the full path to all files work? If not, can you please > create a minimal example as I reference above? > > Best, > > Scott >