My Windows 10 system has just started acting like and usual Windows system: every now and then, it suddenly stops by itself.
Unfortunately, it happened while I was updating TeX Live (2017).
Now, if I try to start the TeX Live GUI, I get immediately the error:
Problem with installation: cannot determine release!
If I launch
tlmgr update --all in the command prompt, I get a series of invisible characters followed by:
at C:/texlive/2017/tlpkg/TeXLive/TLPOBJ.pm line 103, <TMP> line 1.
I've found this post:
"TeX Live Manager" send an error with the message "Cannot determine release"
but its answer doesn't help me, because I have the file
release-texlive.txt in the directory
TeX Live (http://tug.org/texlive) version 2017 This file is public domain. It is read by install-tl --version, tlmgr --version, and texconfig conf, and a final line appended with the precise version number by tl-update-images during a build. The following blank line helps avoid confusing output when used directly from svn, so don't delete it.