[NTG-context] Typescript not found

[S Barmeier]

I have some typescript problems.

The output says

fonts           > typescripts > unknown: library 'mytypescript'
fonts           > typescripts > unknown: library 'Myface'
fonts           > preloading latin modern fonts (third stage)

In my environment file I have

\usetypescriptfile[mytypescript]
\usetypescript[MyIPAex]
\setupbodyfont[Myface,rm,12pt]

and the typescript file is in the same folder as the source files.

What am I doing wrong?

Thanks,
Severin