I managed to have a successfull installation with the installer version of LyX2.3, keeping the anti-virus «Windows Defender» active. So the problem is well linked to the bundle and its interaction with Miktex 2.9.
2018-03-01 17:15 GMT+01:00 Scott Kostyshak <skost...@lyx.org>: > On Thu, Mar 01, 2018 at 10:26:20AM +0000, Emile Lunardon wrote: > > 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. > > Thanks for your help in trying to figure out what's going on, Emile. > Reading your previous message, you are using the bundle to install, > right? Do you have the same problem if you use the installer? I'm not so > surprised that the bundle could mess something up if you already have a > MikTeX installation. But if just using the non-bundle installer messes > something up, that would be a bigger problem, in my opinion, since I > don't think it should touch your MikTeX installation (although I don't > know for sure, maybe there this a good reason to do so). > > Scott >
