[NTG-context] Why mode not recognized?

3 Mar 2020

      Calling ConTeXt with:

mtxrun --autogenerate --mode=epub --script context "$1"

and in the tex-file called:
\starttext
\startmode[epub]
	Producing EPUB\crlf
\stopmode
\startnotmode[epub]
	Not producing EPUB\crlf
\stopnotmode
\stoptext

This produces "Not producing EPUB" Why?

dr. Hans van der Meer