Help - compil error on due board

Hello world !

I am looking for some help since I am facing a new issue with my prefered arduino due board :

compilation error of previous sketchs which compiled perfectly until now, with the message ->

Carte arduino_due_w_dbg (plateforme sam, package arduino) est inconnue

I first recharge the arduino IDE (previous version), recharge the due board driver (last and previous version), but nothing changed. >:(