Thank you, Mojca and Aditya, for your comments and advice. It will take me,
being no virtuoso with Terminal, a while to figure out what exactly I have
to do. It is in my script that I will again run into problems and then I
will beg you to help me out again.


Thank you, Hraban, for suggesting an easy way out: Use ConTeXt-Minimals, but
also there I manage to run into problems, mainly with files and scripts that
I can see in the finder but that are not found in Terminal, not even from
their parent directory.


Robert Blackstone