Hello, the newest update of expl3 breaks xtemplate: \documentclass{minimal} \usepackage{xtemplate} \DeclareObjectType{test}{0} \DeclareTemplateInterface{test}{test}{0}{a:tokenlist={}} \begin{document} \null \end{document} results in ! Undefined control sequence. \xtemplate_parse_keys_elt_aux:n #1->\tl_if_eq:VnT \l_xtemplate_keytype_tl {#... Regards, Philipp