Hello, I've juste read the post from Mitsaki and so I've added my packages to the SweetHome3DBootstrap, in the extensionJarsAndDlls array. And thanks to your link I know now that my .jar are included during the building, while they are in /lib.

Still the connection to the database doesn't work and I don't have any messages in the console.

Do you have any ideas of other things to do to make it work?

Please, I have 3 days left to fix it until my presentation...