> Thomas Fehige <mailto:thomas@fehige.de>
> 29. April 2016 um 10:38
>
> Below is a minimal not-working example extracted from 
> "extensions-001.tex" in the fonts section of the test suite. From what 
> I understand of the code, the second line should read "XPrXcXdXPrX" 
> instead of "abracadabra". But it doesn't, it is still "abracadabra". 
> Compiling the original extensions-001 gives me seven lines of 
> "abracadabra". What am I doing wrong? I'm running ConTeXt version 
> 2015.05.18 12:26 MKIV current fmt: 2016.4.28 from the debian/ubuntu 
> texlive packets.
>
You need a newer context version.

Wolfgang