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I wanted to try the latest version of LuaTeX, so I downloaded the official precompiled binaries but these raw binaries are useless without a luatex.fmt. How can this file be created?

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up vote 4 down vote accepted

I'm assuming you have TeX Live installed, so will have the file 'luatex.ini'. You need that (i.e. copy to where you are going to generate your format file), as it specifies how to build the format. You should then be able to do

luatex -ini luatex.ini

to build the format file.

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I lately had some problems with this solution and solved the issue by running fmtutil --all. – h0b0 Aug 17 '10 at 9:34

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