Dear magicians, I just updated to the latest betas (ConTeXt and LuaTeX taken on svn://scm.foundry.supelec.fr/svn/luatex and I tried to build luatex on my machine (MacBook Pro under Mac OS X 10.5.4): everything goes fine, the binary is there, that is in trunk/build/texk/web2c/luatex but trying to make the formats (as I did usually thanks to the directives given by Thomas Schmitz), I get an error message saying this: ! Emergency stop. \lastexpanded ->\endtemplate \global \everyloadluacode {} \ctxluabyteload ..."#2" } \stopruntimectxluacode } \ctxlua { lua.bytedata[\th... \registerctxluafile ...se \ctxluabyteload {#1}{#2} \fi \global \everyloadluac... l.165 \registerctxluafile{luat-env}{1.001} mkiv lua stats : used config path - /usr/local/texlive/2007/texmf/ web2c/texmf.cnf mkiv lua stats : used cache path - /tmp mkiv lua stats : input load time - 0.067 seconds mkiv lua stats : current memory usage - 6144468 bytes mkiv lua stats : node memory usage - 18 glue_spec, 1 if_stack, 1 dir However ConTeXt mkii works fine. Since I don't use yet extensively mkiv, I am just reporting the issue to inform the community. With my best regards: OK