Historically there were a lot of different TeX distributions. Nowadays there are only a few wide spread. We mention only those that are free and support ConTeXt:
|TeX Live||a lot||tug.org/texlive||web2c, based on teTeX and fpTeX|
|fpTeX||Win32||fptex.org||web2c, based on teTeX|
|gwTeX||MacOS X||rna.nl||web2c, based on TeX Live|
- web2c is a common base for TeX distributions, see tug.org/web2c. It uses the kpathsea tool and its ls-R database for file searches.
- use mktexlsr (same as texhash) to rebuild the file database after every install or change!
- Beware, older web2c distributions keep ConTeXt’s (Perl/Ruby) scripts at .../context/perltk, newer at .../scripts/Perl/context! Make sure to delete the older ones!
MikTeX has anywhere a "rebuild database" menu entry; use it after every install or change!