<div dir="ltr">How do you usually use feature files in luatex. I have followed the instruction at wiki. but it seems I can not use it in Plain TeX. I have attached the files and the error I get is:<br><br>This is LuaTeX, Version beta-0.40.3-2009060821 (Web2C 2009)<br>
(test.tex <luatex-fonts-merged.lua> <luatex-fonts.lua loaded in 0.020 seconds><br>! LuaTeX error ...exmf/tex/luatex/luatex-fonts/luatex-fonts-merged.lua:1782: ba<br>d argument #1 to 'lower' (string expected, got nil).<br>
<to be read again> <br> \body <br>l.11 ...calt;featurefile=palatino.fea at 14pt\body<br> <br>? <br><br><br><br></div>