Processing a table of contents with the latest standalone (ConTeXt ver: 2019.01.28 16:58 MKIV beta fmt: 2019.2.3) fails with the following message: luatex warning > hpack filter: error: ...eXt/tex/texmf-context/tex/context/base/mkiv/typo-dua.lua:422: attempt to compare number with nil tex error > tex error on line 18 in file c_Contents.tex: ? \strc_itemgroups_make_symbol_box ...mbol \fi \fi } \let \strc_itemgroups_extr... \strc_itemgroups_insert_item ...s_make_symbol_box \strc_itemgroups_make_dest... \strc_itemgroups_start_item ...groups_insert_item \dostoptagged \ifcondition... <to be read again> \dotagsetitem \sym ..._symbol \startitemgroupitem \dotagsetitem \s!symbol l.18 \sym{0.} Prolegomena to the Study of Hellenistic Astronomy This worked with the previous standalone. Alan