PDF export fails with pdflatex and LuaTeX

[Paul A. Rubin]

On 2/9/20 1:56 PM, Martin Weise wrote:
> Dear all,
>
> I am using LyX 2.3.3 on Ubuntu 18.04 (and i have been doing so
> (successfully) for almost two years). However, I recently switched
> laptops and therefore needed to reinstall ubuntu.
>
> On the new machine, LyX fails to export pdf files via pdflatex and
> LuaTeX. There is no pdf file after running export. The only thing that
> does work is using ps2pdf.
>
> Here's the message output from Lyx:
>
> ***
> 05:44:25.151: Previewing ...
> 05:44:25.154: (buffer-view: Ctrl+R)
> 05:44:25.158: pdflatex  "Document.tex"
> 05:44:25.232: This is pdfTeX, Version 3.14159265-2.6-1.40.18 (TeX Live
> 2017/Debian) (preloaded format=pdflatex)
> 05:44:25.233:  restricted \write18 enabled.
> 05:44:25.243: entering extended mode
> 05:44:25.244: (./Document.tex
> 05:44:25.253: LaTeX2e <2017-04-15>
> 05:44:25.254: Babel <3.18> and hyphenation patterns for 84 language(s)
> loaded.
> 05:44:25.254:
> 05:44:25.380: pdflatex  "Bauordnungsamt.tex"
> 05:44:25.452: This is pdfTeX, Version 3.14159265-2.6-1.40.18 (TeX Live
> 2017/Debian) (preloaded format=pdflatex)
> 05:44:25.453:  restricted \write18 enabled.
> 05:44:25.462: entering extended mode
> 05:44:25.463: (./Document.tex
> 05:44:25.464: LaTeX2e <2017-04-15>
> 05:44:25.465: Babel <3.18> and hyphenation patterns for 84 language(s)
> loaded.
> 05:44:25.466:
> 05:44:25.593: Successful export to format: PDF
> (pdflatex)support/lassert.cpp (51): ASSERTION status != ExportSuccess
> VIOLATED IN ../../src/Buffer.cpp:4382
> ***
>
> Any idea what might be wrong?
>
> Oh yeah... running pdflatex (manually) on LaTeX code produced by LyX
> does work.
>
Does Document > View work (produce a viewable PDF document) with the 
pdflatex or LuaTeX formats? If so, when export fails, does it leave a 
PDF file in the LyX temp directory?

I'm wondering whether LyX successfully compiles the PDF file in the temp 
directory but then fails to copy or move it to the target directory.

Paul