Am Fri, 16 Jun 2017 09:40:09 +0200 schrieb luigi scarso:

Il 16 giu 2017 09:16, "Christoph Reller" ha scritto:

Hi,

In recent versions of ConTeXt/luatex, I observe the following log entry:

Syntax Error (77727): Unknown filter 'DCTDecode'

This happens if the document includes JPEG images, e.g:

\starttext \externalfigure[hacker.jpg] \stoptext

not here, with that image.

I can't reproduce it either in a current minimals, but miktex had for a few days a similar bug which affected pdftex and (according Christian) also luatex: https://sourceforge.net/p/miktex/bugs/2605/ -- Ulrike Fischer http://www.troubleshooting-tex.de/

Am Fri, 16 Jun 2017 11:08:21 +0200 schrieb luigi scarso:

...

I can't reproduce it either in a current minimals, but miktex had for a few days a similar bug which affected pdftex and (according Christian) also luatex: https://sourceforge.net/p/miktex/bugs/2605/

The message from him """ Thanks, I have fixed this (luatex and xetex were also affected). """ is a bit cryptic, as I have not seen patches for this issue in luatex (perhaps in texlive ?)

I didn't get the issue with texlive, so imho it had to do with something special to the miktex compilation. The commit that fixed the issue is here: https://github.com/MiKTeX/miktex/commit/4a3d1592214f53760f456e54fa2b327f4ac4... -- Ulrike Fischer http://www.troubleshooting-tex.de/

On Fri, Jun 16, 2017 at 11:23 AM, luigi scarso wrote:

On Fri, Jun 16, 2017 at 11:19 AM, Ulrike Fischer wrote:

...

https://github.com/MiKTeX/miktex/commit/4a3d1592214f53760f456e54fa2b327f4ac4...

hm poppler -- we are switching to 0.55. Ok, we will see. Thank you for the link.

-- luigi With poppler 0.55, I am able to reproduce it with

$ convert -size 100x100 radial-gradient: rgradient.jpg; convert rgradient.jpg rgradient.pdf $ cat test.tex \starttext \externalfigure[rgradient.pdf] \stoptext Syntax Error (623): Unknown filter 'DCTDecode' I'm investigating -- luigi