Dear List, I am using the Debian ConTeXt with the following version: context 2024.04.01.20240428+dfsg-2 I am having some issues, particularly with the \sqrt symbol when using a presentation mode in ConTeXt. The following gist has the files in question: https://gist.github.com/kumanna/eb81deae66e34809b9074be1f3f6e9d0 I have the Fontin, Neo Euler and Delicious OTFs loaded properly with mtxrun. In my slide, if the \sqrt is present, I get the following error: lua error: registered function call [254]: /usr/share/texmf/tex/context/base/mkxl/lpdf-lmt.lmt:1681: attempt to perform bitwise operation on a nil value (local 'options') stack traceback: /usr/share/texmf/tex/context/base/mkxl/lpdf-lmt.lmt:1681: in upvalue 'flushrule' /usr/share/texmf/tex/context/base/mkxl/driv-shp.lmt:1659: in upvalue 'vlist_out' /usr/share/texmf/tex/context/base/mkxl/driv-shp.lmt:1196: in upvalue 'hlist_out' /usr/share/texmf/tex/context/base/mkxl/driv-shp.lmt:1198: in upvalue 'hlist_out' /usr/share/texmf/tex/context/base/mkxl/driv-shp.lmt:1625: in upvalue 'vlist_out' /usr/share/texmf/tex/context/base/mkxl/driv-shp.lmt:1196: in upvalue 'hlist_out' /usr/share/texmf/tex/context/base/mkxl/driv-shp.lmt:1625: in upvalue 'vlist_out' /usr/share/texmf/tex/context/base/mkxl/driv-shp.lmt:1196: in upvalue 'hlist_out' /usr/share/texmf/tex/context/base/mkxl/driv-shp.lmt:1198: in upvalue 'hlist_out' /usr/share/texmf/tex/context/base/mkxl/driv-shp.lmt:1198: in upvalue 'hlist_out' ... (skipping 6 levels) /usr/share/texmf/tex/context/base/mkxl/driv-shp.lmt:1198: in upvalue 'hlist_out' /usr/share/texmf/tex/context/base/mkxl/driv-shp.lmt:1198: in upvalue 'hlist_out' /usr/share/texmf/tex/context/base/mkxl/driv-shp.lmt:1625: in upvalue 'vlist_out' /usr/share/texmf/tex/context/base/mkxl/driv-shp.lmt:1623: in upvalue 'vlist_out' /usr/share/texmf/tex/context/base/mkxl/driv-shp.lmt:1196: in upvalue 'hlist_out' /usr/share/texmf/tex/context/base/mkxl/driv-shp.lmt:1198: in upvalue 'hlist_out' /usr/share/texmf/tex/context/base/mkxl/driv-shp.lmt:1198: in upvalue 'hlist_out' /usr/share/texmf/tex/context/base/mkxl/driv-shp.lmt:1625: in upvalue 'vlist_out' /usr/share/texmf/tex/context/base/mkxl/driv-shp.lmt:1799: in upvalue 'converter' /usr/share/texmf/tex/context/base/mkxl/lpdf-lmt.lmt:3719: in upvalue 'convert' /usr/share/texmf/tex/context/base/mkxl/driv-ini.lmt:211: in function (...tail calls...) <empty file> mtx-context | fatal error: return code: 1 Please let me know if there is something I need to fix. Thanks. Kumar