Hi all:

I have this minimal example (thanks to Pablo and Charles):

\mainlanguage [es]

\definefallbackfamily [mainface] [rm] [New Athena Unicode]

[preset = range: greek, force = yes]

% \definefallbackfamily [mainface] [rm] [Old Standard]

% [preset = range: greek, force = yes]

\definefontfamily [mainface] [rm] [TeX Gyre Pagella]

\definefontfamily [mainface] [ss] [TeX Gyre Heros, scale = 0.75]

\setupbodyfont [mainface]

\starttext

Spanish text

\input tufte

Greek Text:

Μετὰ δὲ ταῦτα οὐ πολλαῖς ἡμέραις ὕστερον ἦλθεν ἐξ

Ἀθηνῶν Θυμοχάρης ἔχων ναῦς ὀλίγας · καὶ εὐθὺς ἐναυμάχησαν αὖθις Λακεδαιμόνιοι καὶ Ἀθηναῖοι, ἐνίκησαν δὲ

Λακεδαιμόνιοι ἡγουμένου Ἀγησανδρίδου.

\stoptext

I compile with TeXLive 2020 and Windows 10. I have the two fonts (New Athena Unicode and Old Standard) installed on my system but with New Athena Unicode it does not compile; on the other hand, with Old Standard it does compile. I do not know what I can do.

Thanks for the help.

Manuel González.