Issue with lyx and recent dll

Issue with lyx and recent dll

[Enrico Forestieri]

[-- Attachment #1: Type: text/plain, Size: 817 bytes --]

Hi,

when activating instant preview in Tools>Preferences>Display, one can
preview a latex snippet in the lyx work area by inserting it in a
preview inset (Insert>Preview).

However, since version 3.1.0 it does not work anymore, in the sense
that the preview is not generated. As this feature is working correctly
on all other platforms, investigating a bit evidenced that downgrading
the dll to version 3.0.7 solves the issue.

I am attaching an example document demonstrating the issue. The latex
source used for instant preview is generated in the lyx temporary
directory (/tmp/lyx_tmpdir.XXXXXXXXXXXX/) but latex is never run on it
to generate the images. As lyx launches latex in a forked process, this
has to be a fork problem, but no error is issued. The forked process
seems to never run, simply.

-- 
Enrico

[-- Attachment #2: instant_preview.lyx --]
[-- Type: text/plain, Size: 30106 bytes --]

#LyX 2.3 created this file. For more info see http://www.lyx.org/
\lyxformat 544
\begin_document
\begin_header
\save_transient_properties true
\origin /systemlyxdir/examples/
\textclass article
\begin_preamble
\usepackage{etex}
\usepackage[all, knot]{xy}
\xyoption{arc} 
\usepackage{qtree}
\usepackage{tipa}
\usepackage{pstricks}
\usepackage{pst-plot}
\usepackage{rotating}
\usepackage{tikz}
\usetikzlibrary{scopes}
\end_preamble
\use_default_options false
\maintain_unincluded_children false
\language english
\language_package default
\inputencoding auto
\fontencoding global
\font_roman "lmodern" "default"
\font_sans "default" "default"
\font_typewriter "default" "default"
\font_math "auto" "auto"
\font_default_family default
\use_non_tex_fonts false
\font_sc false
\font_osf false
\font_sf_scale 100 100
\font_tt_scale 100 100
\use_microtype false
\use_dash_ligatures false
\graphics default
\default_output_format pdf
\output_sync 0
\bibtex_command default
\index_command default
\paperfontsize default
\spacing single
\use_hyperref false
\papersize default
\use_geometry false
\use_package amsmath 1
\use_package amssymb 1
\use_package cancel 1
\use_package esint 1
\use_package mathdots 1
\use_package mathtools 1
\use_package mhchem 1
\use_package stackrel 1
\use_package stmaryrd 1
\use_package undertilde 1
\cite_engine basic
\cite_engine_type default
\biblio_style plain
\use_bibtopic false
\use_indices false
\paperorientation portrait
\suppress_date false
\justification true
\use_refstyle 0
\use_minted 0
\index Index
\shortcut idx
\color #008000
\end_index
\secnumdepth 3
\tocdepth 3
\paragraph_separation indent
\paragraph_indentation default
\is_math_indent 0
\math_numbering_side default
\quotes_style english
\dynamic_quotes 0
\papercolumns 1
\papersides 1
\paperpagestyle default
\tracking_changes false
\output_changes false
\html_math_output 0
\html_css_as_file 0
\html_be_strict true
\end_header

\begin_body

\begin_layout Section
Introduction
\end_layout

\begin_layout Standard
In order to properly typeset the document and have instant preview working,
 the following packages have to be installed:
\end_layout

\begin_layout LyX-Code
xy, qtree, tipa, pstricks, pst-plot, rotating, tikz, pgf, etex
\end_layout

\begin_layout Standard
Due to the use of postscript specials in Section 
\begin_inset CommandInset ref
LatexCommand ref
reference "sec:PSTricks"

\end_inset

, only the Postscript or PDF (ps2pdf) output formats will correctly render
 the included images.
 However, the PDF (Xe\SpecialChar TeX
) output seems to also work, while trying to typeset
 the document with 
\family typewriter
pdflatex
\family default
 or 
\family typewriter
pdflualatex
\family default
 will generate errors.
\end_layout

\begin_layout Section
Diagrams by XY(-pic)
\end_layout

\begin_layout Standard
Few examples of diagrams were taken from Aaron Landa's archive of xy-pic
 examples, see 
\begin_inset Flex URL
status collapsed

\begin_layout Plain Layout

https://www.ctan.org/tex-archive/macros/generic/diagrams/xypic/doc/xyguide.pdf
\end_layout

\end_inset

.
\end_layout

\begin_layout Description
Braid
\end_layout

\begin_layout Standard
\begin_inset Preview

\begin_layout Standard
\begin_inset ERT
status collapsed

\begin_layout Plain Layout


\backslash
xy
\end_layout

\begin_layout Plain Layout

(5,10)*{}; (-10,-10)*{} **
\backslash
crv{(6,-2)&(-12,4)}
\end_layout

\begin_layout Plain Layout


\backslash
POS?(.25)*{
\backslash
hole}="x" 
\backslash
POS?(.45)*{
\backslash
hole}="y" 
\backslash
POS?(.6)*{
\backslash
hole}="z";
\end_layout

\begin_layout Plain Layout

"y"+(0,-1); (2,-10)*{} **
\backslash
crv{}
\backslash
POS?(.2)*{
\backslash
hole}="M";
\end_layout

\begin_layout Plain Layout

(-10,10)*{}; "z" **
\backslash
crv{(-9,0)};
\end_layout

\begin_layout Plain Layout

"z"; "M" **
\backslash
crv{};
\end_layout

\begin_layout Plain Layout

"M"; "x" **
\backslash
crv{(5,0)};
\end_layout

\begin_layout Plain Layout

"x"; "y" **
\backslash
crv{(0,7) & (-5,6)};
\end_layout

\begin_layout Plain Layout


\backslash
endxy 
\end_layout

\end_inset


\end_layout

\end_inset


\end_layout

\begin_layout Description
Knots
\end_layout

\begin_layout Standard
\begin_inset Preview

\begin_layout Standard
\begin_inset ERT
status collapsed

\begin_layout Plain Layout


\backslash
xy
\end_layout

\begin_layout Plain Layout

(6,9)*{}="1";
\end_layout

\begin_layout Plain Layout

(-8.5,-1)*{}="2";
\end_layout

\begin_layout Plain Layout

"1";"2" **
\backslash
crv{~*=<.5pt>{.} (0,30)}?(.75)*
\backslash
dir{>}+(-2,2)*{z};
\end_layout

\begin_layout Plain Layout

(-6.5,8)*{}="1";
\end_layout

\begin_layout Plain Layout

(-.5,-9)*{}="2";
\end_layout

\begin_layout Plain Layout

"1";"2" **
\backslash
crv{~*=<.5pt>{.} (-28.5,9.3)}?(.7)*
\backslash
dir{>}+(-2,-2)*{u};
\end_layout

\begin_layout Plain Layout

(-9.5,-3.35)*{}="1";
\end_layout

\begin_layout Plain Layout

(8.5,-3)*{}="2";
\end_layout

\begin_layout Plain Layout

"1";"2" **
\backslash
crv{~*=<.5pt>{.} (-17.67,-24.19)}?(.7)*
\backslash
dir{>}+(-1,-3)*{x};
\end_layout

\begin_layout Plain Layout

(1,-10)*{}="1";
\end_layout

\begin_layout Plain Layout

(6.5,7.13)*{}="2";
\end_layout

\begin_layout Plain Layout

"1";"2" **
\backslash
crv{~*=<.5pt>{.} (17.67,-24.19)}?(.7)*
\backslash
dir{>}+(3,-1)*{y};
\end_layout

\begin_layout Plain Layout

(11,-1)*{}="1";
\end_layout

\begin_layout Plain Layout

(-4,8)*{}="2";
\end_layout

\begin_layout Plain Layout

"1";"2" **
\backslash
crv{~*=<.5pt>{.} (28.5,9.3)}?(.93)*
\backslash
dir{>}+(1,2)*{w};
\end_layout

\begin_layout Plain Layout


\backslash
endxy
\end_layout

\end_inset


\end_layout

\end_inset


\end_layout

\begin_layout Description
Circles
\end_layout

\begin_layout Standard
\begin_inset Preview

\begin_layout Standard
\begin_inset ERT
status collapsed

\begin_layout Plain Layout


\backslash
xy
\end_layout

\begin_layout Plain Layout

(0,0)*
\backslash
xycircle(14,8){++
\backslash
dir{<}};
\end_layout

\begin_layout Plain Layout

(0,0)*
\backslash
xycircle<10pt>{{.}};
\end_layout

\begin_layout Plain Layout

(0,0)*
\backslash
xycircle(5,2){:};
\end_layout

\begin_layout Plain Layout

(0,15)*
\backslash
xycircle(10,4){--};
\end_layout

\begin_layout Plain Layout


\backslash
endxy 
\end_layout

\end_inset


\end_layout

\end_inset


\end_layout

\begin_layout Description
Cobordism
\end_layout

\begin_layout Standard
\begin_inset Preview

\begin_layout Standard
\begin_inset ERT
status collapsed

\begin_layout Plain Layout


\backslash
xy
\end_layout

\begin_layout Plain Layout

(0,0)*
\backslash
ellipse(3,1){.};
\end_layout

\begin_layout Plain Layout

(0,0)*
\backslash
ellipse(3,1)__,=:a(-180){-};
\end_layout

\begin_layout Plain Layout

(-6,-8)*
\backslash
ellipse(3,1){.};
\end_layout

\begin_layout Plain Layout

(6,-8)*
\backslash
ellipse(3,1){.};
\end_layout

\begin_layout Plain Layout

(0,-8)*
\backslash
ellipse(3,1){.};
\end_layout

\begin_layout Plain Layout

(-6,-8)*
\backslash
ellipse(3,1)__,=:a(-180){-};
\end_layout

\begin_layout Plain Layout

(6,-8)*
\backslash
ellipse(3,1)__,=:a(-180){-};
\end_layout

\begin_layout Plain Layout

(0,-8)*
\backslash
ellipse(3,1)__,=:a(180){-};
\end_layout

\begin_layout Plain Layout

(-3,6)*
\backslash
ellipse(3,1){-};
\end_layout

\begin_layout Plain Layout

(3,6)*
\backslash
ellipse(3,1){-};
\end_layout

\begin_layout Plain Layout

(-3,12)*{}="1";
\end_layout

\begin_layout Plain Layout

(3,12)*{}="2";
\end_layout

\begin_layout Plain Layout

(-9,12)*{}="A2";
\end_layout

\begin_layout Plain Layout

(9,12)*{}="B2";
\end_layout

\begin_layout Plain Layout

"1";"2" **
\backslash
crv{(-3,7) & (3,7)};
\end_layout

\begin_layout Plain Layout

(-3,0)*{}="A";
\end_layout

\begin_layout Plain Layout

(3,0)*{}="B";
\end_layout

\begin_layout Plain Layout

(-3,1)*{}="A1";
\end_layout

\begin_layout Plain Layout

(3,1)*{}="B1";
\end_layout

\begin_layout Plain Layout

"A";"A1" **
\backslash
dir{-};
\end_layout

\begin_layout Plain Layout

"B";"B1" **
\backslash
dir{-};
\end_layout

\begin_layout Plain Layout

"B2";"B1" **
\backslash
crv{(8,7) & (3,5)};
\end_layout

\begin_layout Plain Layout

"A2";"A1" **
\backslash
crv{(-8,7) & (-3,5)};
\end_layout

\begin_layout Plain Layout

%REFLECT
\end_layout

\begin_layout Plain Layout

(3,-16)*{}="1";
\end_layout

\begin_layout Plain Layout

(9,-16)*{}="2";
\end_layout

\begin_layout Plain Layout

"1";"2" **
\backslash
crv{(3,-10) & (9,-10)};
\end_layout

\begin_layout Plain Layout

(-3,-16)*{}="1";
\end_layout

\begin_layout Plain Layout

(-9,-16)*{}="2";
\end_layout

\begin_layout Plain Layout

"1";"2" **
\backslash
crv{(-3,-10) & (-9,-10)};
\end_layout

\begin_layout Plain Layout

(-15,-16)*{}="A2";
\end_layout

\begin_layout Plain Layout

(15,-16)*{}="B2";
\end_layout

\begin_layout Plain Layout

(-3,0)*{}="A";
\end_layout

\begin_layout Plain Layout

(3,0)*{}="B";
\end_layout

\begin_layout Plain Layout

(-3,-1)*{}="A1";
\end_layout

\begin_layout Plain Layout

(3,-1)*{}="B1";
\end_layout

\begin_layout Plain Layout

"A";"A1" **
\backslash
dir{-};
\end_layout

\begin_layout Plain Layout

"B";"B1" **
\backslash
dir{-};
\end_layout

\begin_layout Plain Layout

"B2";"B1" **
\backslash
crv{(13,-6) & (2,-8)};
\end_layout

\begin_layout Plain Layout

"A2";"A1" **
\backslash
crv{(-13,-6) & (-2,-8)};
\end_layout

\begin_layout Plain Layout


\backslash
endxy
\end_layout

\end_inset


\end_layout

\end_inset

 
\begin_inset Preview

\begin_layout Standard
\begin_inset ERT
status collapsed

\begin_layout Plain Layout


\backslash
xy 0;/r.18pc/:
\end_layout

\begin_layout Plain Layout

(20,2)*{
\backslash
bullet}="RU"+(1,3)*{x^{
\backslash
ast}};
\end_layout

\begin_layout Plain Layout

(16,-3)*{
\backslash
bullet}="RD"+(2.5,2)*{x^{
\backslash
ast}};
\end_layout

\begin_layout Plain Layout

(-16,2)*{
\backslash
bullet}="LU"+(-1,2)*{x};
\end_layout

\begin_layout Plain Layout

(-20,-3)*{
\backslash
bullet}="LD"+(-1,2)*{x};
\end_layout

\begin_layout Plain Layout

"RU";"RD" **
\backslash
crv{(4,2) & (4,-1)}; ?(.1)*
\backslash
dir{<}; ?(.85)*
\backslash
dir{<};
\end_layout

\begin_layout Plain Layout

"LD";"LU" **
\backslash
crv{(-4,-2) & (-4,1)};
\end_layout

\begin_layout Plain Layout

?(.08)*
\backslash
dir{<}; ?(.85)*
\backslash
dir{<};
\end_layout

\begin_layout Plain Layout

(7.5,0)*{}="x1"; (-7.5,0)*{}="x2";
\end_layout

\begin_layout Plain Layout

"x1"; "x2" **
\backslash
crv{(7,-10) & (-7,-10)};
\end_layout

\begin_layout Plain Layout

(16,-20)*{
\backslash
bullet}="RDD"+(2.5,-1)*{x^{
\backslash
ast}};
\end_layout

\begin_layout Plain Layout

(-20,-20)*{
\backslash
bullet}="LDD"+(-1,-3)*{x};
\end_layout

\begin_layout Plain Layout

(20,-12.5)*{
\backslash
bullet}="RUD"+(3.5,1)*{x^{
\backslash
ast}};
\end_layout

\begin_layout Plain Layout

(-16,-15)*{
\backslash
bullet}="LUD";
\end_layout

\begin_layout Plain Layout

(-16,-2.5)*{}="A"; (16.1,-14.9)*{}="B";
\end_layout

\begin_layout Plain Layout

"RD"; "RDD" **
\backslash
dir{-};
\end_layout

\begin_layout Plain Layout

"LD"; "LDD" **
\backslash
dir{-};
\end_layout

\begin_layout Plain Layout

"A"; "LUD" **
\backslash
dir{.};
\end_layout

\begin_layout Plain Layout

"RDD"; "LDD" **
\backslash
crv{(0,-17)}; ?(.57)*
\backslash
dir{>};
\end_layout

\begin_layout Plain Layout

"RU"; "RUD" **
\backslash
dir{-};
\end_layout

\begin_layout Plain Layout

"LU"; "A" **
\backslash
dir{-};
\end_layout

\begin_layout Plain Layout

"B"; "RUD" **
\backslash
crv{(18,-14.15)};
\end_layout

\begin_layout Plain Layout

"B"; "LUD" **
\backslash
crv{~*=<4pt>{.}(0,-18)}; ?(.4)*
\backslash
dir{<};
\end_layout

\begin_layout Plain Layout


\backslash
endxy
\end_layout

\end_inset


\end_layout

\end_inset


\end_layout

\begin_layout Description
Strings
\end_layout

\begin_layout Standard
\begin_inset Preview

\begin_layout Standard
\begin_inset ERT
status open

\begin_layout Plain Layout


\backslash
xy (-15,0)*{};(15,0)*{};
\end_layout

\begin_layout Plain Layout


\backslash
endxy
\end_layout

\begin_layout Plain Layout


\backslash
qquad = 
\backslash
qquad 
\backslash
xy
\end_layout

\begin_layout Plain Layout

(-10,12)*{}; (-10,-12)*{}; **
\backslash
dir{-}?(.5)*
\backslash
dir{<}+(-4,0)*{F(x)};
\end_layout

\begin_layout Plain Layout

(-2,12)*{}="1";
\end_layout

\begin_layout Plain Layout

(6,-7) *{}="2";
\end_layout

\begin_layout Plain Layout

(14,-7) *{}="3";
\end_layout

\begin_layout Plain Layout

(14,-13)*{}="3'";
\end_layout

\begin_layout Plain Layout

(18,0) *={}="";
\end_layout

\begin_layout Plain Layout

"1";"2" **
\backslash
crv{(-4,-21)&(5,-15)};
\end_layout

\begin_layout Plain Layout

?(.15)*
\backslash
dir{<}+(5,10)*{
\backslash
overline{F(x)}};
\end_layout

\begin_layout Plain Layout

"2";"3" **
\backslash
crv{(6,1)&(14,1)};
\end_layout

\begin_layout Plain Layout

?(0)*
\backslash
dir{<}+(4,8)*{
\backslash
widetilde{F(i_x)}} ;
\end_layout

\begin_layout Plain Layout

?(.95)*
\backslash
dir{<}+(5,-2)*{F(
\backslash
overline x)};
\end_layout

\begin_layout Plain Layout

"3";"3'" **
\backslash
dir{-};
\end_layout

\begin_layout Plain Layout

(-2,6)*{}="X1";
\end_layout

\begin_layout Plain Layout

(-10,6)*{}="X2";
\end_layout

\begin_layout Plain Layout

"X1";"X2" **
\backslash
crv{~*=<2pt>{.}(-2,-1)&(-10,-1)};
\end_layout

\begin_layout Plain Layout

(-2,-6)*{}="XA";
\end_layout

\begin_layout Plain Layout

(-10,-6)*{}="XB";
\end_layout

\begin_layout Plain Layout

"XA";"XB" **
\backslash
crv{~*=<2pt>{.}(-2,1)&(-10,1)};
\end_layout

\begin_layout Plain Layout


\backslash
endxy
\end_layout

\end_inset


\end_layout

\end_inset


\end_layout

\begin_layout Description
Categories
\end_layout

\begin_layout Standard
\begin_inset Preview

\begin_layout Standard
\begin_inset ERT
status collapsed

\begin_layout Plain Layout


\backslash
xymatrix{
\end_layout

\begin_layout Plain Layout

(x 
\backslash
otimes 1) 
\backslash
otimes y
\end_layout

\begin_layout Plain Layout


\backslash
ar[rr]^{a_{x,1,y}}
\end_layout

\begin_layout Plain Layout


\backslash
ar[dr]_{r_x 
\backslash
otimes 1_y}
\end_layout

\begin_layout Plain Layout

&& x 
\backslash
otimes(1 
\backslash
otimes y)
\end_layout

\begin_layout Plain Layout


\backslash
ar[dl]^{1_x 
\backslash
otimes
\backslash
ell_y } 
\backslash

\backslash

\end_layout

\begin_layout Plain Layout

& x 
\backslash
otimes y }
\end_layout

\end_inset


\end_layout

\end_inset

 
\begin_inset Preview

\begin_layout Standard
\begin_inset ERT
status collapsed

\begin_layout Plain Layout


\backslash
xy
\end_layout

\begin_layout Plain Layout

(-9,0)*+{
\backslash
bullet}="1";
\end_layout

\begin_layout Plain Layout

(0,0)*+{
\backslash
bullet}="2";
\end_layout

\begin_layout Plain Layout

{
\backslash
ar@/^.9pc/ "1";"2"};
\end_layout

\begin_layout Plain Layout

{
\backslash
ar@/_.9pc/ "1";"2"};
\end_layout

\begin_layout Plain Layout

{
\backslash
ar@/^2pc/ "1";"2"};
\end_layout

\begin_layout Plain Layout

{
\backslash
ar@/_2pc/ "1";"2"};
\end_layout

\begin_layout Plain Layout

{
\backslash
ar@{=>} (-4.5,1.5)*{};(-4.5,-1.5)*{}} ;
\end_layout

\begin_layout Plain Layout

{
\backslash
ar@{=>} (-4.5,7.25)*{};(-4.5,4.75)*{}} ;
\end_layout

\begin_layout Plain Layout

{
\backslash
ar@{=>} (-4.5,-4.75)*{};(-4.5,-7.25)*{}} ;
\end_layout

\begin_layout Plain Layout

(0,0)*+{
\backslash
bullet}="1";
\end_layout

\begin_layout Plain Layout

(9,0)*+{
\backslash
bullet}="2";
\end_layout

\begin_layout Plain Layout

(18,0)*+{
\backslash
bullet}="3";
\end_layout

\begin_layout Plain Layout

{
\backslash
ar "1";"2"};
\end_layout

\begin_layout Plain Layout

{
\backslash
ar "2";"3"};
\end_layout

\begin_layout Plain Layout

{
\backslash
ar@/^1pc/ "1";"2"};
\end_layout

\begin_layout Plain Layout

{
\backslash
ar@/_1pc/ "1";"2"};
\end_layout

\begin_layout Plain Layout

{
\backslash
ar@{=>} (4.5,3)*{};(4.5,.75)*{}} ;
\end_layout

\begin_layout Plain Layout

{
\backslash
ar@{=>} (4.5,-.75)*{};(4.5,-3)*{}} ;
\end_layout

\begin_layout Plain Layout


\backslash
endxy 
\end_layout

\end_inset


\end_layout

\end_inset


\end_layout

\begin_layout Description
Transformations
\end_layout

\begin_layout Standard
\begin_inset Preview

\begin_layout Standard
\begin_inset ERT
status collapsed

\begin_layout Plain Layout


\backslash
xy %FIG.19.
 Natural transformation between functors.
\end_layout

\begin_layout Plain Layout

(-26,-2)*+{
\backslash
bullet}="a";
\end_layout

\begin_layout Plain Layout

(-12,3)*+{
\backslash
bullet}="b";
\end_layout

\begin_layout Plain Layout

(-16,-5)*+{
\backslash
bullet}="c";
\end_layout

\begin_layout Plain Layout

{
\backslash
ar@/^.25pc/ "a";"b"};
\end_layout

\begin_layout Plain Layout

{
\backslash
ar@/_.25pc/"a";"c"};
\end_layout

\begin_layout Plain Layout

{
\backslash
ar@/_.15pc/ "b";"c"};
\end_layout

\begin_layout Plain Layout

%START TOP
\end_layout

\begin_layout Plain Layout

(12,10)*+{
\backslash
bullet}="ta";
\end_layout

\begin_layout Plain Layout

(26,15)*+{
\backslash
bullet}="tb";
\end_layout

\begin_layout Plain Layout

(22,8)*+{
\backslash
bullet}="tc";
\end_layout

\begin_layout Plain Layout

{
\backslash
ar@/^.25pc/ "ta";"tb"};
\end_layout

\begin_layout Plain Layout

{
\backslash
ar@/_.25pc/ "ta";"tc"};
\end_layout

\begin_layout Plain Layout

{
\backslash
ar@/_.15pc/ "tb";"tc"};
\end_layout

\begin_layout Plain Layout

%START bottom
\end_layout

\begin_layout Plain Layout

(12,-10)*+{
\backslash
bullet}="ba";
\end_layout

\begin_layout Plain Layout

(26,-5)*+{
\backslash
bullet}="bb";
\end_layout

\begin_layout Plain Layout

(22,-12)*+{
\backslash
bullet}="bc";
\end_layout

\begin_layout Plain Layout

{
\backslash
ar@/^.25pc/@{.>} "ba";"bb"};
\end_layout

\begin_layout Plain Layout

{
\backslash
ar@/_.25pc/ "ba";"bc"};
\end_layout

\begin_layout Plain Layout

{
\backslash
ar@/_.15pc/ "bb";"bc"};
\end_layout

\begin_layout Plain Layout

%START CONNECT
\end_layout

\begin_layout Plain Layout

{
\backslash
ar@/_.15pc/ "ta";"ba"};
\end_layout

\begin_layout Plain Layout

{
\backslash
ar@/_.15pc/ "tb";"bb"};
\end_layout

\begin_layout Plain Layout

{
\backslash
ar@/_.15pc/ "tc";"bc"};
\end_layout

\begin_layout Plain Layout

%START ARROWS AND LABELS
\end_layout

\begin_layout Plain Layout

(-12,6)*{}="DF";
\end_layout

\begin_layout Plain Layout

(6,10)*{}="CF";
\end_layout

\begin_layout Plain Layout

{
\backslash
ar@/^.35pc/^F "DF";"CF"};
\end_layout

\begin_layout Plain Layout

(-12,-6)*{}="DF";
\end_layout

\begin_layout Plain Layout

(6,-10)*{}="CF";
\end_layout

\begin_layout Plain Layout

{
\backslash
ar@/_.35pc/_G "DF";"CF"};
\end_layout

\begin_layout Plain Layout

(-2,5)*{}="DF";
\end_layout

\begin_layout Plain Layout

(-2,-5)*{}="CF";
\end_layout

\begin_layout Plain Layout

{
\backslash
ar@{=>}^{
\backslash
alpha} "DF";"CF"};
\end_layout

\begin_layout Plain Layout

(29,3)*{D};
\end_layout

\begin_layout Plain Layout

(-23,3)*{C};
\end_layout

\begin_layout Plain Layout


\backslash
endxy 
\end_layout

\end_inset


\end_layout

\end_inset


\end_layout

\begin_layout Section
IPA
\end_layout

\begin_layout Standard
\begin_inset Preview

\begin_layout Standard
\begin_inset ERT
status collapsed

\begin_layout Plain Layout


\backslash
textipa{Ekspl@"neIS@n}
\end_layout

\end_inset


\end_layout

\end_inset


\end_layout

\begin_layout Section
QTree
\end_layout

\begin_layout Standard
\begin_inset Preview

\begin_layout Standard
\begin_inset ERT
status collapsed

\begin_layout Plain Layout


\backslash
Tree[.S [.N This ] [.V is ] [.NP [.Det a ] [.N test ] ] ] 
\end_layout

\end_inset


\end_layout

\end_inset


\begin_inset Preview

\begin_layout Standard
\begin_inset ERT
status collapsed

\begin_layout Plain Layout


\backslash
Tree [.$
\backslash
sigma$ $
\backslash
mu$ $
\backslash
mu$ ]
\end_layout

\end_inset


\end_layout

\end_inset


\end_layout

\begin_layout Section
PSTricks
\begin_inset CommandInset label
LatexCommand label
name "sec:PSTricks"

\end_inset


\end_layout

\begin_layout Standard
Some simple graphing examples.
\end_layout

\begin_layout Subsection
Function plotting
\end_layout

\begin_layout Standard
\begin_inset Preview

\begin_layout Standard
\begin_inset ERT
status open

\begin_layout Plain Layout


\backslash
begin{pspicture*}(-1,-3.5)(10.5,3.5)
\end_layout

\begin_layout Plain Layout


\backslash
psaxes{->}(0,0)(0,-3)(10,3)
\end_layout

\begin_layout Plain Layout


\backslash
uput[-90](10,0){$x$}
\backslash
uput[0](0,3){$f(x)$}
\end_layout

\begin_layout Plain Layout


\backslash
psplot[linecolor=red,linewidth=1pt]{0.1}{10}{ x ln }
\end_layout

\begin_layout Plain Layout


\backslash
end{pspicture*}
\end_layout

\end_inset


\end_layout

\end_inset


\end_layout

\begin_layout Subsection
Inline data plotting
\end_layout

\begin_layout Standard
\align center
\begin_inset Preview

\begin_layout Standard
\align center
\begin_inset ERT
status open

\begin_layout Plain Layout


\backslash
begin{pspicture*}(-1.5,-1.5)(11,5)
\end_layout

\begin_layout Plain Layout


\backslash
psaxes{->}(0,0)(0,0)(10,5)
\end_layout

\begin_layout Plain Layout


\backslash
psset{linewidth=2.5pt}
\end_layout

\begin_layout Plain Layout


\backslash
rput(5.0,-1.0){Speed [MPH]}
\end_layout

\begin_layout Plain Layout


\backslash
rput(-1.0,1.0){
\backslash
begin{rotate}{90}Cost [Dollars]
\backslash
end{rotate}}
\end_layout

\begin_layout Plain Layout


\backslash
savedata{
\backslash
mydata}[{{0,0},{1.3,0.32},{5.5,1.1},{6.5,1.15},{8.1,1.28},{10,4}}]
\end_layout

\begin_layout Plain Layout


\backslash
dataplot[plotstyle=curve,showpoints=true,dotstyle=triangle,linecolor=blue]{
\backslash
mydata} 
\end_layout

\begin_layout Plain Layout


\backslash
end{pspicture*}
\end_layout

\end_inset


\end_layout

\end_inset


\end_layout

\begin_layout Subsection
Lissajous curves
\end_layout

\begin_layout Standard
\begin_inset Preview

\begin_layout Standard
\begin_inset ERT
status open

\begin_layout Plain Layout


\backslash
begin{pspicture*}(-1.1,-1.1)(1.1,1.1)
\end_layout

\begin_layout Plain Layout


\backslash
parametricplot[plotstyle=line,plotpoints=50,linecolor=red]{0}{8}{50 t mul
 cos 100 t mul sin}
\end_layout

\begin_layout Plain Layout


\backslash
end{pspicture*}
\end_layout

\end_inset


\end_layout

\end_inset


\begin_inset space \hfill{}
\end_inset


\begin_inset Preview

\begin_layout Standard
\begin_inset ERT
status open

\begin_layout Plain Layout


\backslash
begin{pspicture*}(-1.1,-1.1)(1.1,1.1)
\end_layout

\begin_layout Plain Layout


\backslash
parametricplot[plotstyle=line,plotpoints=100,linecolor=red]{0}{8}{150 t
 mul cos 100 t mul sin}
\end_layout

\begin_layout Plain Layout


\backslash
end{pspicture*}
\end_layout

\end_inset


\end_layout

\end_inset


\begin_inset space \hfill{}
\end_inset


\begin_inset Preview

\begin_layout Standard
\begin_inset ERT
status open

\begin_layout Plain Layout


\backslash
begin{pspicture*}(-1.1,-1.1)(1.1,1.1)
\end_layout

\begin_layout Plain Layout


\backslash
parametricplot[plotstyle=line,plotpoints=150,linecolor=red]{0}{8}{150 t
 mul cos 200 t mul sin}
\end_layout

\begin_layout Plain Layout


\backslash
end{pspicture*}
\end_layout

\end_inset


\end_layout

\end_inset


\begin_inset space \hfill{}
\end_inset


\begin_inset Preview

\begin_layout Standard
\begin_inset ERT
status open

\begin_layout Plain Layout


\backslash
begin{pspicture*}(-1.1,-1.1)(1.1,1.1)
\end_layout

\begin_layout Plain Layout


\backslash
parametricplot[plotstyle=line,plotpoints=200,linecolor=red]{0}{8}{250 t
 mul cos 200 t mul sin}
\end_layout

\begin_layout Plain Layout


\backslash
end{pspicture*}
\end_layout

\end_inset


\end_layout

\end_inset


\end_layout

\begin_layout Section
TikZ
\end_layout

\begin_layout Standard
\begin_inset Flex URL
status collapsed

\begin_layout Plain Layout

http://www.texample.net/media/tikz/examples/TEX/free-body-diagrams.tex
\end_layout

\end_inset


\end_layout

\begin_layout Standard
\begin_inset Preview

\begin_layout Standard
\begin_inset ERT
status collapsed

\begin_layout Plain Layout


\backslash
def
\backslash
iangle{35} % Angle of the inclined plane
\end_layout

\begin_layout Plain Layout


\backslash
def
\backslash
down{-90}
\end_layout

\begin_layout Plain Layout


\backslash
def
\backslash
arcr{0.5cm} % Radius of the arc used to indicate angles
\end_layout

\begin_layout Plain Layout

\end_layout

\begin_layout Plain Layout


\backslash
begin{tikzpicture}[
\end_layout

\begin_layout Plain Layout

    force/.style={>=latex,draw=blue,fill=blue},
\end_layout

\begin_layout Plain Layout

    axis/.style={densely dashed,gray,font=
\backslash
small},
\end_layout

\begin_layout Plain Layout

    M/.style={rectangle,draw,fill=lightgray,minimum size=0.5cm,thin},
\end_layout

\begin_layout Plain Layout

    m/.style={rectangle,draw=black,fill=lightgray,minimum size=0.3cm,thin},
\end_layout

\begin_layout Plain Layout

    plane/.style={draw=black,fill=blue!10},
\end_layout

\begin_layout Plain Layout

    string/.style={draw=red, thick},
\end_layout

\begin_layout Plain Layout

    pulley/.style={thick},
\end_layout

\begin_layout Plain Layout

]
\end_layout

\begin_layout Plain Layout

\end_layout

\begin_layout Plain Layout


\backslash
matrix[column sep=1cm] {
\end_layout

\begin_layout Plain Layout

    %% Sketch
\end_layout

\begin_layout Plain Layout

    
\backslash
draw[plane] (0,-1) coordinate (base)
\end_layout

\begin_layout Plain Layout

                     -- coordinate[pos=0.5] (mid) ++(
\backslash
iangle:3) coordinate (top)
\end_layout

\begin_layout Plain Layout

                     |- (base) -- cycle;
\end_layout

\begin_layout Plain Layout

    
\backslash
path (mid) node[M,rotate=
\backslash
iangle,yshift=0.25cm] (M) {};
\end_layout

\begin_layout Plain Layout

    
\backslash
draw[pulley] (top) -- ++(
\backslash
iangle:0.25) circle (0.25cm)
\end_layout

\begin_layout Plain Layout

                   ++ (90-
\backslash
iangle:0.5) coordinate (pulley);
\end_layout

\begin_layout Plain Layout

    
\backslash
draw[string] (M.east) -- ++(
\backslash
iangle:1.5cm) arc (90+
\backslash
iangle:0:0.25)
\end_layout

\begin_layout Plain Layout

                  -- ++(0,-1) node[m] {};
\end_layout

\begin_layout Plain Layout

\end_layout

\begin_layout Plain Layout

    
\backslash
draw[->] (base)++(
\backslash
arcr,0) arc (0:
\backslash
iangle:
\backslash
arcr);
\end_layout

\begin_layout Plain Layout

    
\backslash
path (base)++(
\backslash
iangle*0.5:
\backslash
arcr+5pt) node {$
\backslash
alpha$};
\end_layout

\begin_layout Plain Layout

    %%
\end_layout

\begin_layout Plain Layout

\end_layout

\begin_layout Plain Layout

&
\end_layout

\begin_layout Plain Layout

    %% Free body diagram of M
\end_layout

\begin_layout Plain Layout

    
\backslash
begin{scope}[rotate=
\backslash
iangle]
\end_layout

\begin_layout Plain Layout

        
\backslash
node[M,transform shape] (M) {};
\end_layout

\begin_layout Plain Layout

        % Draw axes and help lines
\end_layout

\begin_layout Plain Layout

\end_layout

\begin_layout Plain Layout

        {[axis,->]
\end_layout

\begin_layout Plain Layout

            
\backslash
draw (0,-1) -- (0,2) node[right] {$+y$};
\end_layout

\begin_layout Plain Layout

            
\backslash
draw (M) -- ++(2,0) node[right] {$+x$};
\end_layout

\begin_layout Plain Layout

            % Indicate angle.
 The code is a bit awkward.
\end_layout

\begin_layout Plain Layout

\end_layout

\begin_layout Plain Layout

            
\backslash
draw[solid,shorten >=0.5pt] (
\backslash
down-
\backslash
iangle:
\backslash
arcr)
\end_layout

\begin_layout Plain Layout

                arc(
\backslash
down-
\backslash
iangle:
\backslash
down:
\backslash
arcr);
\end_layout

\begin_layout Plain Layout

            
\backslash
node at (
\backslash
down-0.5*
\backslash
iangle:1.3*
\backslash
arcr) {$
\backslash
alpha$};
\end_layout

\begin_layout Plain Layout

        }
\end_layout

\begin_layout Plain Layout

\end_layout

\begin_layout Plain Layout

        % Forces
\end_layout

\begin_layout Plain Layout

        {[force,->]
\end_layout

\begin_layout Plain Layout

            % Assuming that Mg = 1.
 The normal force will therefore be cos(alpha)
\end_layout

\begin_layout Plain Layout

            
\backslash
draw (M.center) -- ++(0,{cos(
\backslash
iangle)}) node[above right] {$N$};
\end_layout

\begin_layout Plain Layout

            
\backslash
draw (M.west) -- ++(-1,0) node[left] {$f_R$};
\end_layout

\begin_layout Plain Layout

            
\backslash
draw (M.east) -- ++(1,0) node[above] {$T$};
\end_layout

\begin_layout Plain Layout

        }
\end_layout

\begin_layout Plain Layout

\end_layout

\begin_layout Plain Layout

    
\backslash
end{scope}
\end_layout

\begin_layout Plain Layout

    % Draw gravity force.
 The code is put outside the rotated
\end_layout

\begin_layout Plain Layout

    % scope for simplicity.
 No need to do any angle calculations.
 
\end_layout

\begin_layout Plain Layout

    
\backslash
draw[force,->] (M.center) -- ++(0,-1) node[below] {$Mg$};
\end_layout

\begin_layout Plain Layout

    %%
\end_layout

\begin_layout Plain Layout

\end_layout

\begin_layout Plain Layout

&
\end_layout

\begin_layout Plain Layout

    %%%
\end_layout

\begin_layout Plain Layout

    % Free body diagram of m
\end_layout

\begin_layout Plain Layout

    
\backslash
node[m] (m) {};
\end_layout

\begin_layout Plain Layout

    
\backslash
draw[axis,->] (m) -- ++(0,-2) node[left] {$+$};
\end_layout

\begin_layout Plain Layout

    {[force,->]
\end_layout

\begin_layout Plain Layout

        
\backslash
draw (m.north) -- ++(0,1) node[above] {$T'$};
\end_layout

\begin_layout Plain Layout

        
\backslash
draw (m.south) -- ++(0,-1) node[right] {$mg$};
\end_layout

\begin_layout Plain Layout

    }
\end_layout

\begin_layout Plain Layout

\end_layout

\begin_layout Plain Layout


\backslash

\backslash

\end_layout

\begin_layout Plain Layout

};
\end_layout

\begin_layout Plain Layout


\backslash
end{tikzpicture}
\end_layout

\begin_layout Plain Layout

\end_layout

\end_inset


\end_layout

\end_inset


\end_layout

\end_body
\end_document

Re: Issue with lyx and recent dll

[Marco Atzeri]

On 28.05.2020 12:50, Enrico Forestieri wrote:
> Hi,
> 
> when activating instant preview in Tools>Preferences>Display, one can
> preview a latex snippet in the lyx work area by inserting it in a
> preview inset (Insert>Preview).
> 
> However, since version 3.1.0 it does not work anymore, in the sense
> that the preview is not generated. As this feature is working correctly
> on all other platforms, investigating a bit evidenced that downgrading
> the dll to version 3.0.7 solves the issue.
> 
> I am attaching an example document demonstrating the issue. The latex
> source used for instant preview is generated in the lyx temporary
> directory (/tmp/lyx_tmpdir.XXXXXXXXXXXX/) but latex is never run on it
> to generate the images. As lyx launches latex in a forked process, this
> has to be a fork problem, but no error is issued. The forked process
> seems to never run, simply.
> 
> 

Testing on 2.3.4.2-2, it seems that the file is processed:

from lyxpreviewE14071.log

This is pdfTeX, Version 3.14159265-2.6-1.40.21 (TeX Live 2020/Cygwin) 
(preloaded
  format=latex 2020.4.22)  28 MAY 2020 19:21

....
! LaTeX Error: File `qtree.sty' not found.


the file seems in texlive-collection-humanities

Re: Issue with lyx and recent dll

[Marco Atzeri]

On 28.05.2020 19:35, Marco Atzeri wrote:
> On 28.05.2020 12:50, Enrico Forestieri wrote:
>> Hi,
>>
>> when activating instant preview in Tools>Preferences>Display, one can
>> preview a latex snippet in the lyx work area by inserting it in a
>> preview inset (Insert>Preview).
>>
>> However, since version 3.1.0 it does not work anymore, in the sense
>> that the preview is not generated. As this feature is working correctly
>> on all other platforms, investigating a bit evidenced that downgrading
>> the dll to version 3.0.7 solves the issue.
>>
>> I am attaching an example document demonstrating the issue. The latex
>> source used for instant preview is generated in the lyx temporary
>> directory (/tmp/lyx_tmpdir.XXXXXXXXXXXX/) but latex is never run on it
>> to generate the images. As lyx launches latex in a forked process, this
>> has to be a fork problem, but no error is issued. The forked process
>> seems to never run, simply.
>>
>>
> 
> Testing on 2.3.4.2-2, it seems that the file is processed:
> 
> from lyxpreviewE14071.log
> 
> This is pdfTeX, Version 3.14159265-2.6-1.40.21 (TeX Live 2020/Cygwin) 
> (preloaded
>   format=latex 2020.4.22)  28 MAY 2020 19:21
> 
> ....
> ! LaTeX Error: File `qtree.sty' not found.
> 
> 
> the file seems in texlive-collection-humanities

after installing also another package
texlive-collection-pstricks

I was able to have an instant preview

can you check if the test 2.3.4.2-2
solve the issue also for you ?
Than I can promote it to stable

Regards
Marco

Re: Issue with lyx and recent dll

[Enrico Forestieri]

On Thu, May 28, 2020 at 07:35:12PM +0200, Marco Atzeri via Cygwin wrote:
> On 28.05.2020 12:50, Enrico Forestieri wrote:
> > Hi,
> > 
> > when activating instant preview in Tools>Preferences>Display, one can
> > preview a latex snippet in the lyx work area by inserting it in a
> > preview inset (Insert>Preview).
> > 
> > However, since version 3.1.0 it does not work anymore, in the sense
> > that the preview is not generated. As this feature is working correctly
> > on all other platforms, investigating a bit evidenced that downgrading
> > the dll to version 3.0.7 solves the issue.
> > 
> > I am attaching an example document demonstrating the issue. The latex
> > source used for instant preview is generated in the lyx temporary
> > directory (/tmp/lyx_tmpdir.XXXXXXXXXXXX/) but latex is never run on it
> > to generate the images. As lyx launches latex in a forked process, this
> > has to be a fork problem, but no error is issued. The forked process
> > seems to never run, simply.
> > 
> > 
> 
> Testing on 2.3.4.2-2, it seems that the file is processed:
> 
> from lyxpreviewE14071.log
> 
> This is pdfTeX, Version 3.14159265-2.6-1.40.21 (TeX Live 2020/Cygwin)
> (preloaded
>  format=latex 2020.4.22)  28 MAY 2020 19:21
> 
> ....
> ! LaTeX Error: File `qtree.sty' not found.
> 
> 
> the file seems in texlive-collection-humanities

Thanks for checking. This is weird. I tried it on 2 different computers
and it is not processed. I see the lyxpreview*.tex but no lyxpreview*.log.
After closing the document I see on the terminal the message
"ForkedProcess::kill(0)", meaning that lyx thinks the preview process is
still running and tries to kill it.

-- 
Enrico

Re: Issue with lyx and recent dll

[Enrico Forestieri]

On Thu, May 28, 2020 at 08:09:49PM +0200, Marco Atzeri via Cygwin wrote:
> 
> after installing also another package
> texlive-collection-pstricks
> 
> I was able to have an instant preview
> 
> can you check if the test 2.3.4.2-2
> solve the issue also for you ?
> Than I can promote it to stable

Yes, that did it! I am curious to know how you compiled it, because I see
the same strange behavior when compiling lyx from source.

-- 
Enrico

Re: Issue with lyx and recent dll

[Marco Atzeri]

On 28.05.2020 20:25, Enrico Forestieri wrote:
> On Thu, May 28, 2020 at 08:09:49PM +0200, Marco Atzeri via Cygwin wrote:
>>
>> after installing also another package
>> texlive-collection-pstricks
>>
>> I was able to have an instant preview
>>
>> can you check if the test 2.3.4.2-2
>> solve the issue also for you ?
>> Than I can promote it to stable
> 
> Yes, that did it! I am curious to know how you compiled it, because I see
> the same strange behavior when compiling lyx from source.
> 


--enable-qt5 PYTHON="python3"

Regards
Marco

Re: Issue with lyx and recent dll

[Enrico Forestieri]

On Thu, May 28, 2020 at 10:01:15PM +0200, Marco Atzeri via Cygwin wrote:
> On 28.05.2020 20:25, Enrico Forestieri wrote:
> > On Thu, May 28, 2020 at 08:09:49PM +0200, Marco Atzeri via Cygwin wrote:
> > > 
> > > after installing also another package
> > > texlive-collection-pstricks
> > > 
> > > I was able to have an instant preview
> > > 
> > > can you check if the test 2.3.4.2-2
> > > solve the issue also for you ?
> > > Than I can promote it to stable
> > 
> > Yes, that did it! I am curious to know how you compiled it, because I see
> > the same strange behavior when compiling lyx from source.
> > 
> 
> 
> --enable-qt5 PYTHON="python3"

Doh!

Nevertheless, it remains a mystery why I had to revert to cygwin 3.0.7
for having instant preview working with the Qt4 version.

-- 
Enrico

Re: Issue with lyx and recent dll

[Marco Atzeri]

On 29.05.2020 17:29, Enrico Forestieri wrote:
> On Thu, May 28, 2020 at 10:01:15PM +0200, Marco Atzeri via Cygwin wrote:
>> On 28.05.2020 20:25, Enrico Forestieri wrote:
>>> On Thu, May 28, 2020 at 08:09:49PM +0200, Marco Atzeri via Cygwin wrote:
>>>>
>>>> after installing also another package
>>>> texlive-collection-pstricks
>>>>
>>>> I was able to have an instant preview
>>>>
>>>> can you check if the test 2.3.4.2-2
>>>> solve the issue also for you ?
>>>> Than I can promote it to stable
>>>
>>> Yes, that did it! I am curious to know how you compiled it, because I see
>>> the same strange behavior when compiling lyx from source.
>>>
>>
>>
>> --enable-qt5 PYTHON="python3"
> 
> Doh!

I also patched the source to replace python with python3 in all
the scripts.

> 
> Nevertheless, it remains a mystery why I had to revert to cygwin 3.0.7
> for having instant preview working with the Qt4 version.

No idea on this.

Regards
Marco

Re: Issue with lyx and recent dll

[Enrico Forestieri]

On Mon, Jun 01, 2020 at 10:26:05PM +0200, Marco Atzeri wrote:
> On 29.05.2020 17:29, Enrico Forestieri wrote:
> > On Thu, May 28, 2020 at 10:01:15PM +0200, Marco Atzeri via Cygwin wrote:
> >> On 28.05.2020 20:25, Enrico Forestieri wrote:
> >>> On Thu, May 28, 2020 at 08:09:49PM +0200, Marco Atzeri via Cygwin wrote:
> >>>>
> >>>> after installing also another package
> >>>> texlive-collection-pstricks
> >>>>
> >>>> I was able to have an instant preview
> >>>>
> >>>> can you check if the test 2.3.4.2-2
> >>>> solve the issue also for you ?
> >>>> Than I can promote it to stable
> >>>
> >>> Yes, that did it! I am curious to know how you compiled it, because I see
> >>> the same strange behavior when compiling lyx from source.
> >>>
> >>
> >>
> >> --enable-qt5 PYTHON="python3"
> > 
> > Doh!
> 
> I also patched the source to replace python with python3 in all
> the scripts.
> 
> > 
> > Nevertheless, it remains a mystery why I had to revert to cygwin 3.0.7
> > for having instant preview working with the Qt4 version.
> 
> No idea on this.

I found that this is due to having defined "LyXServer pipe" in
Tools>Preferences>Paths. Specifying there the path for the fifo results
in instant preview not working. Removing it, instant preview works
again. The puzzling part is that it seems to always work on a computer
regardless of "LyXServer pipe", while it works on another one only if
the "LyXServer pipe" field is left empty.

Instead, with cygwin 3.0.7 it seems to always work.

-- 
Enrico

Re: Issue with lyx and recent dll

[Ken Brown]

On 6/3/2020 4:34 PM, Enrico Forestieri wrote:
> On Mon, Jun 01, 2020 at 10:26:05PM +0200, Marco Atzeri wrote:
>> On 29.05.2020 17:29, Enrico Forestieri wrote:
>>> On Thu, May 28, 2020 at 10:01:15PM +0200, Marco Atzeri via Cygwin wrote:
>>>> On 28.05.2020 20:25, Enrico Forestieri wrote:
>>>>> On Thu, May 28, 2020 at 08:09:49PM +0200, Marco Atzeri via Cygwin wrote:
>>>>>>
>>>>>> after installing also another package
>>>>>> texlive-collection-pstricks
>>>>>>
>>>>>> I was able to have an instant preview
>>>>>>
>>>>>> can you check if the test 2.3.4.2-2
>>>>>> solve the issue also for you ?
>>>>>> Than I can promote it to stable
>>>>>
>>>>> Yes, that did it! I am curious to know how you compiled it, because I see
>>>>> the same strange behavior when compiling lyx from source.
>>>>>
>>>>
>>>>
>>>> --enable-qt5 PYTHON="python3"
>>>
>>> Doh!
>>
>> I also patched the source to replace python with python3 in all
>> the scripts.
>>
>>>
>>> Nevertheless, it remains a mystery why I had to revert to cygwin 3.0.7
>>> for having instant preview working with the Qt4 version.
>>
>> No idea on this.
> 
> I found that this is due to having defined "LyXServer pipe" in
> Tools>Preferences>Paths. Specifying there the path for the fifo results
> in instant preview not working. Removing it, instant preview works
> again. The puzzling part is that it seems to always work on a computer
> regardless of "LyXServer pipe", while it works on another one only if
> the "LyXServer pipe" field is left empty.
> 
> Instead, with cygwin 3.0.7 it seems to always work.

There were some major changes in Cygwin's fifo implementation in cygwin 3.1.0. 
It doesn't seem to have gotten a lot of testing until fairly recently, when some 
bugs were discovered and fixed in cygwin 3.1.5.  Have you tried the latter? 
(There's also some new functionality for fifos in cygwin 3.1.5, but I doubt if 
that's relevant to your issue.)

Ken

Re: Issue with lyx and recent dll

[Enrico Forestieri]

On Wed, 03 Jun 2020 at 11:03:27PM +0200, Ken Brown wrote:

> There were some major changes in Cygwin's fifo implementation in
cygwin 3.1.0.

> It doesn't seem to have gotten a lot of testing until fairly recently,
when some

> bugs were discovered and fixed in cygwin 3.1.5. Have you tried the latter?

> (There's also some new functionality for fifos in cygwin 3.1.5, but I
doubt if

> that's relevant to your issue.)


Thanks Ken. Just installed cygwin 3.1.5 and the issue seems to have
gone. Great!


-- 

Enrico