[NTG-context] unknown library

Mij font setup is nothing more then \setupbodyfont[cambria,12pt] An underfull hbox I can understand but wherefrom these messages about an “unknown library normal”? I guess it is not the font, because substituting lmodern for cambria makes no difference. Does this signify I should change something? If so, then what? Underfull \hbox (badness 1014) in paragraph at lines 7--7 []<15: cambria @ 10.0pt> adres[] fonts > typescripts > unknown library 'normal' fonts > typescripts > unknown library 'normal' pages > flushing realpage 108, userpage 108 dr. Hans van der Meer