When I launch the ConTeXt command from AucTEX Command menu (or with C-c C-c), AucTEX calls for texexec and compilation fails since texexec relies on ruby dependencies that are not installed under my Windows account. This piece of code may be somehow outdated: AFAIK, texexec is rather designed for MkII. Moreover, it would be good to be free to choose context or contextjit.
Of course under Emacs everything can be configured. I looked for a way to change the texexec variable to context in my .emacs. All I could find is that TeX-command-default, when set to 'ConTeXt', launches texexec. I do not know how to change this.
Any idea ?