I installed context according to this page on my Fedora 15 system. Installation seems to went well. But after runing context on this document:
mtx-context | run 1: luatex --fmt="/var/lib/texmf/luatex-cache/context/254f26b81d3615bc933c9bf20a856557/formats/cont-en" --lua="/var/lib/texmf/luatex-cache/context/254f26b81d3615bc933c9bf20a856557/formats/cont-en.lui" --backend="pdf" "./a.tex"
This is LuaTeX, Version beta-0.70.1-2012020407 (rev 4277)
\write18 enabled.
(a.tex
ConTeXt ver: 2011.05.18 18:04 MKIV fmt: 2012.2.6 int: english/english
system > cont-new.mkiv loaded
(/usr/share/texlive/texmf-dist/tex/context/base/cont-new.mkiv
system > beware: some patches loaded from cont-new.mkiv
)
system > a.top loaded
(a.top)
fonts > latin modern fonts are not preloaded
languages > language en is active
{/usr/share/texlive/texmf-dist/fonts/map/pdftex/context/mkiv-base.map}
fonts > preloading latin modern fonts (second stage)
(/usr/share/texlive/texmf-dist/tex/context/base/type-siz.mkiv) (/usr/share/texlive/texmf-dist/tex/context/base/type-otf.mkiv){/usr/share/texlive/texmf-dist/fonts/map/dvips/lm/lm-math.map}{/usr/share/texlive/texmf-dist/fonts/map/dvips/lm/lm-rm.map}
fonts > virtual math > unable to resolve name mapsfromchar
fonts > fallback modern rm 12pt is loaded
system > begin file a.tex at line 1
backend > xmp > using file '/usr/share/texlive/texmf-dist/tex/context/base/lpdf-pdx.xml'
mtx-context | fatal error: no return code, message: luatex: execution interrupted