Dear list,

I have experienced a problem updating the ConTeXt version I use on a current Linux operating system flavour beginning ca. two months ago.
By that time, as was successfully applied several times before within the past year of me using ConTeXt, I initiated the update process on the bash console via one command recommended on the corresponding ConTeXt page: "sh ./first-setup.sh --context=current".
Then, and on two other ocassions very recently, ConTeXt got stuck (after data had indeed been received and some actions concerning the usual update had been executed, too) giving back the following lines in the bash console that puzzled me a lot:
"...
This is LuaTeX, Version beta-0.87.0 (TeX Live 2016/dev) (INITEX)
system commands enabled.
(/home/ichhalt/context/tex/texmf-context/tex/context/base/cont-nl.mkiv (/home/ichhalt/context/tex/texmf-context/tex/context/base/context.mkiv (/home/ichhalt/context/tex/texmf-context/tex/context/base/syst-ini.mkiv
! Undefined control sequence.
l.1020 pdfoutput
zerocount"
I admit that this code example is quite short, but it is definitely the last that the whole ConTeXt update process returns-otherwise it stood still.
What-except for uninstalling and re-installing ConTeXt-could help now? If ever possible, a conservation of my current ConTeXt installation appeared preferable to me.