[texhax] tikz externalize with LuaTeX 0.95

[Arno Trautmann]

Hi all,

I have a document using externalizaton of a tikz (pgfplots) figure. It 
works fine with pdfLaTeX and LuaTeX 0.80 from TL 2015, but fails on 
LuaTeX 0.95 from TL 2016. I added the luatex085 package, but does not 
seem to help. Without externalization, the document compiles fine. With 
ext., it does not even start the process correctly and leaves no log 
file to investigate. The consove just responds with the error message 
shown below.
The document is just a minimal one:

\RequirePackage{luatex85}
\documentclass{minimal}
\usepackage{pgfplots}
\usepgfplotslibrary{external}
\tikzexternalize
\begin{document}
\begin{tikzpicture}
\end{tikzpicture}
test
\end{document}

I can only guess that this is related to the changes in LuaTeX from 0.85 
on, but since I get no useable output, I'd be thankful for any hints on 
what to do with this situation …
If the external file is already present, e.g. produced by a pdfLaTeX 
run, LuaLaTeX silently integrates it, even if I try to force remaking.

Any help appreciated,
best
Arno


tikz output:

===== 'mode=convert with system call': Invoking 'lualatex -shell-escape 
-halt-on-error -interaction=batchmode -jobname 
"./figures_pgfplots/test-figure0" 
"\def\tikzexternalrealjob{test}\input{test}"' ========
lualatex -shell-escape -halt-on-error -interaction=batchmode -jobname 
"./figures_pgfplots/test-figure0" 
"\def\tikzexternalrealjob{test}\input{test}"

./test.tex:18: Package tikz Error: Sorry, the system call 'lualatex 
-shell-escape -halt-on-error -interaction=batchmode -jobname 
"./figures_pgfplots/test-figure0" 
"\def\tikzexternalrealjob{test}\input{test}"' did NOT result in a usable 
output file './figures_pgfplots/test-figure0' (expected one of 
.pdf:.jpg:.jpeg:.
png:). Please verify that you have enabled system calls. For pdflatex, 
this is 'pdflatex -shell-escape'. Sometimes it is also named 'write 18' 
or something like that. Or maybe the command simply failed? Error 
messages can be found in './figures_pgfplots/test-figure0.log'. If you 
continue now, I'll try to typeset the picture.