Machining problem in Catia v5R27

Hello

Please I have a question about CAM on Catia: Have you ever been unable to choose your machining machine on Catia when you want to define your machining phase? It happened to me on every version of CATIA I installed (I have the 2017 version right now). I click on the icon to choose the machining machine and then there is nothing (no opening of the machine choice window). How to solve this problem please?