OK, so now I have that one :
java.lang.IndexOutOfBoundsException: Index: 3, Size: 3
at java.util.ArrayList.RangeCheck(ArrayList.java:507)
at java.util.ArrayList.get(ArrayList.java:324)
at gnu.mail.providers.imap.IMAPMessage.update(IMAPMessage.java:247)
at gnu.mail.providers.imap.IMAPFolder.fetch(IMAPFolder.java:843)
at gnu.mail.providers.imap.IMAPFolder.copyMessages(IMAPFolder.java:
698)
at TestDeplacementMailGNU112.moveMail
(TestDeplacementMailGNU112.java:63)
at TestDeplacementMailGNU112.test(TestDeplacementMailGNU112.java:47)
at TestDeplacementMailGNU112.main(TestDeplacementMailGNU112.java:31)