On 2013–08–04 Michael Ash wrote:
But env_letter.tex calls two pdf files with \externalfigure (see
below). These two pdf files are also in the directory pointed to by
TEXMFHOME but they show up in the finished document as gray state:
unknown boxes
This works here.
\setupexternalfigure
I asked:
(4) Where can I put personal files that I would like context to use
regularly.
which Marco kindly answered:
In the directory TEXMFHOME points to or texmf-local.
This works for my personal file env_letter.tex which is called with
\environment env_letter.tex.This file