If the exception is an IOException, it's probably due to the save system. In fact, when the program start, I store in a Path object the following path: System.getenv("APPDATA") + "/Robo". But APPDATA is only for windows. Then, it crashes my program. I tought it works for all platform because I read quickly the answer in this stackoverflow question.

If this isn't an IOExceptio or if the exception don't append, when the program try to save, I do not know and in this case I would like to know it.

Thank you.

No, because all "components" are hand made, I don't work too much on accessibility.

Thank you.