The bTABLE is still broken in latest beta. Minimal example: \starttext \setupTABLE[c][each][width=1cm] \bTABLE \bTR\bTD Test \eTD\eTR \eTABLE \stoptext Error log: ! Missing number, treated as zero. system > tex > error on line 5 in file test.tex: Missing number, treated as zero ... 1 \starttext 2 \setupTABLE[c][each][width=1cm] 3 \bTABLE 4 \bTR\bTD Test \eTD\eTR 5 >> \eTABLE 6 \stoptext 7 <to be read again> \275>2:1 <argument> ...n \tabl_ntb_get_aut \c_tabl_ntb_col \relax \ifdim \localwidth ... \secondoftwoarguments #1#2->#2 \tabl_ntb_cell_process ...\tabl_tnb_cell_finalize }}\scratchdimen \tabl_ntb_... <inserted text> ...align_start \tabl_ntb_pass 1 1 \tabl_ntb_column_next \tab... \tabl_ntb_flush_content ...p \cr \the \t_tabl_ntb \dostoptagged \egroup \dos... ... l.5 \eTABLE ?