Hi, the \digits command cause a error message with the last beta in MkIV. % engine=luatex \starttext \digits{1.000} \stoptext ! \textfont 1 is undefined (character :). \mathematics #1->\relax \ifmmode #1\else $#1$ \fi \doscandigit ...\digitoutputmode ,\else .\fi \fi } \egroup \digitsep ...x \digitsepbox \hbox {\doscandigit #1 }\fi \chardef \skipdigit 0... \scandigits #1->\if #1.\digitsep 1 \else \if #1,\digitsep 2\else \if #1@\digi... \next *#1->\dododohandletokens {#1} \dohandletokens <argument> 1. 000 ... l.3 \digits{1.000} Best regards, Wolfgang