Why doesn't it seem possible to have the following macro \def\docall#1{\csname xmlprocess#1\encsname{}{}} and use it with \docall{buffer}? How then accomplish this? Runaway argument? \def \sourcenode {exam::15}\edef \currentsource {\xmlattdef {exam::15\ETC. ! File ended while scanning use of \buff_gobble. ... \luat_start_lua_code_indeed ...nd \directlua {#1}} Hans van der Meer