Hi,

Here's a simple MWE:

==============
\starttext
Default {\definedfont[ALMFixed]ALM} Default
\stoptext
==============

I have the "ALM Fixed" font installed (otf from
https://ctan.org/tex-archive/fonts/almfixed).  I do not see any errors in
the output.  In particular, Context sees the font and the logs contain the
following line:

mkiv lua stats  > loaded fonts: 3 files: almfixed.otf,
latinmodern-math.otf, lmroman12-regular.otf

Yet, the output from lmtx does not display the "ALM" string, though its
place is reserved on the line.  The same file typesets fine with mkiv.

Thanks
--MHB