I think I worked it out ... > local args_win = {} > args_win [0] = "texlua" > args_win [1] = '"' .. "texlua" .. '"' > args_win [2] = "d:/TeX/Live/2008/texmf/scripts/texlive/texdoc.tlu" > args_win [3] = "minitoc" > os.spawn (args_win) This also works ...