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ConTeXt MkII scripts used to be written in Perl (phased out), then switched to Ruby and now to Lua. You To run [[Mark_II|MkII]], you need to have at least Ruby installed installed, and Perl for mptopdf.For [[Mark_IV|MkIV]] neither are needed. The installation instructions on this page are for Windows. Linux installations normally come with both Perl and Ruby pre-installed. For MacOS, it is easy to get Perl via [https://www.macports.org |Macports] or [https://brew.sh/ |Homebrew], and Ruby comes pre-installed.
You can download Ruby [http://rubyinstaller.rubyforge.org/wiki/wiki.pl here] (automatic installation) or [http://ftp.ruby-lang.org/pub/ruby/binaries/mswin32/ here] (you need to extract files from zip and add ruby to PATH).
If windows complains about ''"Command not found"'', go to the ''Control Panel'' -> ''System'' -> ''Advanced'' -> click on the ''"Environment variables"'' and choose '''path''' in ''"system variables"''. Type in the path (e.g. D\Program Files\Perl\bin\;) where the ruby and perl *.exe files are installed. Generally, the installation is automatic. you may not need the above method.
If you get an error similar to ''invalid multibyte escape'' from Ruby, you may need to use a version of Ruby earlier than 1.9. There may be other ways to get around this problem; see e.g. http://gnuu.org/2009/11/02/ruby-1-9-encoding-issues-again/.
[[Category:Old Content]]
