Hi, With the latest upload (2022-09-16 14:41) I wanted to compare some older projects that I've used with MKIV to the LMTX 2.10.00. In one of which I am using the Lato 2.0 font ( https://packages.debian.org/sid/fonts-lato). With MKIV I get the correct output but LMTX complains about not being able to find the font. There seems to be an issue with the typescript file type-imp-lato.mkiv. MWE: \setupbodyfont[lato,12pt] \starttext Hello World! \stoptext --- ConTeXt ver: 2022.09.11 20:44 MKIV - luatex version: 1.1501, functionality level: 7539: mtxrun --script fonts --list --all --pattern=*lato* identifier familyname fontname filename subfont instances latoblack lato latoblack Lato-Bla.ttf latoblackitalic lato latoblackitalic Lato-BlackItalic.ttf latobold lato latobold Lato-Bol.ttf latobolditalic lato latobolditalic Lato-BoldItalic.ttf latoextrabold lato latoheavy Lato-Heavy.ttf latoextralight lato latothin Lato-Thin.ttf latohairline lato latohairline Lato-Hai.ttf latohairlineitalic lato latohairlineitalic Lato-HaiIta.ttf latoheavy lato latoheavy Lato-Heavy.ttf latoheavyitalic lato latoheavyitalic Lato-HeavyItalic.ttf latoitalic lato latoitalic Lato-Italic.ttf latolight lato latolight Lato-Lig.ttf latolightitalic lato latolightitalic Lato-LightItalic.ttf latomedium lato latomedium Lato-Medium.ttf latomediumitalic lato latomediumitalic Lato-MediumItalic.ttf latonormal lato latohairline Lato-Hai.ttf latoregular lato latoregular Lato-Reg.ttf latosemibold lato latosemibold Lato-Semibold.ttf latosemibolditalic lato latosemibolditalic Lato-SemiboldItalic.ttf latothin lato latothin Lato-Thin.ttf latothinitalic lato latothinitalic Lato-ThinItalic.ttf fonts > otf loading > loading '/usr/share/texlive/texmf-dist/fonts/truetype/typoland/lato/Lato-Regular.ttf', hash 'lato-regular' mkiv lua stats > loaded fonts: 3 files: xitsmath-bold.otf, xitsmath-regular.otf, lato-regular.ttf --- ConTeXt ver: 2022.09.11 20:44 LMTX - luametatex version: 2.1, functionality level: 20220918: mtxrun --script fonts --list --all --pattern=*lato* identifier familyname fontname filename subfont instances latoblack lato latoblack Lato-Bla.ttf latoblackitalic lato latoblackitalic Lato-BlackItalic.ttf latobold lato latobold Lato-Bol.ttf latobolditalic lato latobolditalic Lato-BoldItalic.ttf latoextrabold lato latoheavy Lato-Heavy.ttf latoextralight lato latothin Lato-Thin.ttf latohairline lato latohairline Lato-Hai.ttf latohairlineitalic lato latohairlineitalic Lato-HaiIta.ttf latoheavy lato latoheavy Lato-Heavy.ttf latoheavyitalic lato latoheavyitalic Lato-HeavyItalic.ttf latoitalic lato latoitalic Lato-Italic.ttf latolight lato latolight Lato-Lig.ttf latolightitalic lato latolightitalic Lato-LightItalic.ttf latomedium lato latomedium Lato-Medium.ttf latomediumitalic lato latomediumitalic Lato-MediumItalic.ttf latonormal lato latohairline Lato-Hai.ttf latoregular lato latoregular Lato-Reg.ttf latosemibold lato latosemibold Lato-Semibold.ttf latosemibolditalic lato latosemibolditalic Lato-SemiboldItalic.ttf latothin lato latothin Lato-Thin.ttf latothinitalic lato latothinitalic Lato-ThinItalic.ttf close source > level 2, order 6, name '/usr/share/texmf/tex/context/fonts/mkiv/type-imp-lato.mkiv' fonts > defining > font with asked name 'lato-regular' is not found using lookup 'file' fonts > defining > unable to define 'lato-regular' as 'lato-12pt-ss-tf-0--0' --- If I change the file: reference I get it working with both MKIV/LMTX: \starttypescript [\s!sans] [lato] [\s!name] \setups[\s!font:\s!fallback:\s!sans] % \definefontsynonym [\s!Sans] [\s!file:lato-regular] [\s!features=\s!default] % \definefontsynonym [\s!SansBold] [\s!file:lato-bold] [\s!features=\s!default] \definefontsynonym [\s!Sans] [\s!file:lato-reg] [\s!features=\s!default] \definefontsynonym [\s!SansBold] [\s!file:lato-bol] [\s!features=\s!default] \definefontsynonym [\s!SansItalic] [\s!file:lato-italic] [\s!features=\s!default] \definefontsynonym [\s!SansBoldItalic] [\s!file:lato-bolditalic] [\s!features=\s!default] \stoptypescript mkiv lua stats > loaded fonts: 3 files: xitsmath-bold.otf, xitsmath-regular.otf, lato-reg.ttf Does MKIV handle fonts differently to LMTX? I can see some tma/tmc references in MKIV: system > lua > compiling '/home/reviczky/.texlive2021/texmf-var/luatex-cache/context/e570cb3e0e3ab0118ca08dd148bbec7d/fonts/otl/lato-regular.tma' into '/home/reviczky/.texlive2021/texmf-var/luatex-cache/context/e570cb3e0e3ab0118ca08dd148bbec7d/fonts/otl/lato-regular.tmc' system > lua > dumping '/home/reviczky/.texlive2021/texmf-var/luatex-cache/context/e570cb3e0e3ab0118ca08dd148bbec7d/fonts/otl/lato-regular.tma' into '/home/reviczky/.texlive2021/texmf-var/luatex-cache/context/e570cb3e0e3ab0118ca08dd148bbec7d/fonts/otl/lato-regular.tmc' stripped But looking at the mtxrun font list I cannot see the "lato-regular", so not sure how MKIV points to /usr/share/texlive/texmf-dist/fonts/truetype/typoland/lato/Lato-Regular.ttf. I am cleaning the cache and do a generate and fonts reload each time. Is changing the type-imp-lato.mkiv as above the right approach to get lato working in both MKIV and LMTX? Thanks, Adam