In my experience these configuration failures occur either when one of LyX and MikTeX (or TeXLive) has been installed as administrator and the other as ordinary user, or when one is installed under Windows and the other under another OS. Since Cygwin acts in some ways as an OS, in particular in its use of Unix-type file paths, this may indeed be the cause of your problems.

However, for using LyX, there is no need to install Cywgin. The normal Windows LyX with Windows MikTeX or TeXLive is sufficient. You do not need to uninstall Cygwin, just install either Windows LyX with Windows MikTeX or TeXLive, or Cygwin LyX with Cywgin TeXLive.

Cheers,

Kees

Op 06-03-19 om 20:34 schreef Patrick Dupre:
I guess that I have the answer.
lyx-2.3.2-cygwin.tar.gz <https://ftp.lip6.fr/pub/lyx/bin/2.3.2/lyx-2.3.2-cygwin.tar.gz>
has not been installed.
But configure.py  should have detected it!
===========================================================================
Patrick DUPRÉ | | email: pdu...@gmx.com
Laboratoire interdisciplinaire Carnot de Bourgogne
9 Avenue Alain Savary, BP 47870, 21078 DIJON Cedex FRANCE
Tel: +33 (0)380395988
===========================================================================
*Sent:* Wednesday, March 06, 2019 at 8:29 PM
*From:* "Patrick Dupre" <pdu...@gmx.com>
*To:* "Richard Kimberly Heck" <rikih...@lyx.org>
*Cc:* "Kornel Benko" <kor...@lyx.org>, lyx-users@lists.lyx.org
*Subject:* Re: configuration fails

I am sorry for the confusion.
none of the files exist on the computer.
Anyway. I do not think that it is the issue.
It seems that the py file terminates normally.
Is checkTeXPaths  executed?
 it seems that the output windows_style_tex_paths is not set
is it because the statement is false?
if os.name == 'nt' or sys.platform == 'cygwin':
why test only nt and cygwin ?
cygwin is not installed, it does not seems that we need cygwin for lyx.
Could you confirm it?
checkOtherEntries does not provide any information
lyx_kpsewhich may be not set to true
I will check about
    checkModulesConfig()
    checkCiteEnginesConfig()
    checkXTemplates()
    checkLatexConfig()
    removeTempFiles()
later after the os issue has need clarified.
*Sent:* Wednesday, March 06, 2019 at 7:43 PM
*From:* "Richard Kimberly Heck" <rikih...@lyx.org>
*To:* "Patrick Dupre" <pdu...@gmx.com>, "Kornel Benko" <kor...@lyx.org>
*Cc:* lyx-users@lists.lyx.org
*Subject:* Re: configuration fails
On 3/6/19 8:27 AM, Patrick Dupre wrote:

    Hello,

    The configuration stop at
    DEBUG: Removing file a b.tex
    DEBUG: Removing file a b.log
    DEBUG: Failed to remove file texput.log

    Actually, any of the 3 files exists on the computer

Sorry, do you mean these files do exist, or that they do not exist? If they do exist, what directory are they in?


    I can comment these lines in the python file, but it does not help.
    Actually, the rest of the file is not executed!

    I check on the permissions of the Lyx and Miktex files. But I do
    not see
    any thing wrong.

One possibility is that this is some kind of file-locking issue. We've seen this kind of thing on Windows before, though with temporary files.

Riki

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