FLAG(nn) specifies the minimum severity level of messages that will appear in the compiler listing.
You can specify a one or two-digit number, nn, that specifies the minimum severity level of messages that you want to appear in the compiler listing. Messages that have severity levels of this specified value or higher will appear in the compiler listing. The default value for FLAG is 0. FLAG(0) indicates that all messages will appear in the compiler listing.
(C) Copyright IBM Corporation 1992, 2006. All Rights Reserved.