I tried again to install LyX2.3 on my PC running on WINDOWS 8.1. This time as you have suggested, I have disabled the virus scanner (windows defender) and installed only for the current user. The result is identical to the first installation attempt : neither LyX2.3 nor LyX2.2.3 document compilation works due to problem with Miktex 2.9 (wrong termination of pdflalex, missing classes, spaces in directory paths). Then I have performed a package maintenance of Miktex (one new package downloaded) and I have reconfigured both LyX2.3 and LyX2.2.3. RESULT : both LyX versions manage to compile documents now.
CONCLUSION The installation of LyX2.3 seems to corrupt the Miktex configuration. This is not due to an interaction with the anti-virus (disabled). Hopefully an upgrade of Miktex (if there is a new package to install) repairs Miktex 2.9 and allows LyX to work again. 2018-02-28 17:54 GMT+01:00 Scott Kostyshak <skost...@lyx.org>: > On Wed, Feb 28, 2018 at 07:06:08AM +0000, Emile Lunardon wrote: > > I had a big problem with the use of the new LyX 2.3 bundle. > > > > The installation by itself went fine, side by side with the current LyX > > 2.2.3 version, using my existing local Miktex 2.9 distribution. But the > > compilation with LyX 2.3 of any document failed with a report of a > problem > > on pdflatex.exe (something like missing program). I tried to reconfigure > > LyX 2.3 but the problem remained. > > I then switched to LyX 2.2.3 and faced the same problem with in addition > > the reported missing of some document classes. It seemed that the Miktex > > configuration was corrupted. > > > > I then uninstalled LyX 2.3 and had to upgrade/maintain the Miktex > > configuration with its package manager to recover a working LyX 2.2.3. > > > > So there is certainly a problem with the way LyX 2.3 interacts with > Miktex. > > I had no problem of this kind with the LyX2.3RC 1 & 2. > > Thanks for this detailed report, Emile. Take a look at this message: > > https://www.mail-archive.com/search?l=mid&q=20180228110424.6 > 160469.4449.14790%40web.de > > If you follow the instructions there (disabling the virus scanner, if > you feel comfortable enough to do so), does it then work? I do not know > why this is different from rc2. I hope we can figure that out. > > Scott >
