Dear Thomas and Aditya, Thank you for the reply. TEXMFLOCAL, TEXMFDIST is the order in texmf.cnf. So the order in .luatex is OK. 1. I changed '/usr/local/texlive/2007/../texmf-local' in the .luatex file to '/usr/local/texlive/texmf-local' %%%%%%% echo $TEXMF {/Users/dalyoung/.texlive2007/texmf-config,/Users/ dalyoung/.texlive2007/texmf-var,/Users/dalyoung/Library/texmf,/usr/ local/texlive/2007/texmf-config,/usr/local/texlive/2007/texmf-var,/usr/ local/texlive/2007/texmf,/usr/local/texlive/texmf-local,/usr/local/ texlive/2007/texmf-dist} %%%%%%%%%% 2. 'luatools --generate'. 3. Then it locate the files in right positions. $ luatools cont-new.tex /usr/local/texlive/texmf-local/tex/context/base/cont-new.tex And I succeeded to create the format file and a very simple test file worked very well. I don't know what is the difference between '/texlive/2007/../texmf- local/' and '/texlive/texmf-local/'. Thank you for your concern again. Best regards, Dalyoung Jeong