Dear list, I've come across that the new math (which by the way looks really nice) requires some additional properties to be set in the font definition. If I take the example file provided by Mikael and add the following lines \usetypescriptfile[alegreya] \setupbodyfont[alegreya,11pt] It fails with the following error message: "tex error on line 16 in file /Users/aleks/Desktop/Test Context/someformulas.tex: Math error: parameter 'limitbelowbgap' with id 36 in style 0 is not set" Libertinus works fine by adding the following two lines \usetypescriptfile[libertinus] \setupbodyfont[libertinus,11pt] Could someone enlighten me? The font definition file is attached. BR, Alex