Hello, Is there any possibility use TeX comments (text behind character %) in Lua strings? When I use comment char % inside luastring, then rest of string (i.e. next TeX definitions) are for TeX invisible. For example: When I make string : TeXDefsByLua=[[ \def\printline{ \directlua{printline()} \par\hrule\par } \def\printall{ \directlua{printall()} \par\hrule\par } ]] tex.sprint(TeXDefsByLua) then is all right, BUT when I make string : TeXDefsByLua=[[ \def\printline{ % my comment inside string \directlua{printline()} \par\hrule\par } \def\printall{ \directlua{printall()} \par\hrule\par } ]] tex.sprint(TeXDefsByLua) then I get message: "Undefined control sequence" Is there possibility use TeX comments inside Lua strings? Thanx Jaroslav