I make questions and answers :) Finally... it works but it's not perfect (at all).
As parameters : /cygdrive/c/cygwin/etc/node_modules/less/bin/lessc %Name%%ext% > blabla.css It works but > blabla.css not. So, I have, in the good folder, the wanted file (a less file converted to a css file)... but without a good filename. Not > %File%, nor something.css works. I have always ď
