Support for xfig graphics

[Rudi Gaelzer]

Running:
Fedora Core 36 on x64 box
KDE Plasma Version: 5.24.5
LyX Version 2.3.6.1 (provided by Fedora repo)

It seems that the support for xfig figures is not working on my system.  See the 
attached files.
The Xfig file sets the TeX flag for text.

In the LyX window, the preview fails.  When I try to view the document with 
pdflatex, the following error message appears in the latex log:

! LaTeX Error: File `0_home_rudi_temp_ufrgs_Coulomb_Law.pdftex_t' not found.

Exporting to LaTeX (pdflatex) generates the attached file.  Running on terminal:
rudi at stix|ufrgs>pdflatex tes_xfig01.tex
gives the expected error:
! LaTeX Error: File `Coulomb_Law.pdftex_t' not found.
because the exporter did not generate the Coulomb_Law.pdftex_t file.

-- 
Rudi Gaelzer
Physics Institute - UFRGS
BRAZIL
Registered Linux user # 153741
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