My error message in its entirety.
I was doing an edit during a build… then this happened and will not stop.
Latest stable Meteor, with an angular 2 project.
C:\Users\Greg\AppData\Local.meteor\packages\templating\1.1.9\plugin.compileTemplatesBatch.os\npm\node_mo
dules\meteor\promise\node_modules\meteor-promise\promise_server.js:116
throw error;
^
Error: EBUSY, rmdir ‘C:\Users\Greg\WebstormProjects\Saturn_V2_b.meteor\local\build\programs\server’