Maybe \unexpanded\def\strc_tags_element_start_yes_indeed {\iftrialtypesetting \expandafter\strc_tags_element_start_yes_indeed_yes \else \expandafter\strc_tags_element_start_nop_indeed \fi} \unexpanded\def\strc_tags_element_stop {\iftrialtypesetting \expandafter\strc_tags_element_stop_yes \else \expandafter\strc_tags_element_stop_nop \fi} should be \unexpanded\def\strc_tags_element_start_yes_indeed {\iftrialtypesetting \expandafter\strc_tags_element_start_nop_indeed \else \expandafter\strc_tags_element_start_yes_indeed_yes \fi} \unexpanded\def\strc_tags_element_stop {\iftrialtypesetting \expandafter\strc_tags_element_stop_nop \else \expandafter\strc_tags_element_stop_yes \fi} ? -- luigi