Hallo Frank,
wie wäre es mit:

To change the message that FTP sends, the message file QTCPMSGF in library QTCP can be edited. In this specific scenario, the TCP1106 message text must be changed using the following command:

CHGMSGD MSGID(TCP1106) MSGF(QTCP/QTCPMSGF) +
MSG('250 File transfer completed successfully.'