Both the Extended Function Support (EFS) program and its exit routines (EFS01 and EFS02) can send messages to DFSORT for printing. The EFS program can send messages to DFSORT for printing at Major Call 1, 2, 3, or 4. EFS01 and EFS02 can only send messages to DFSORT for printing at Major Call 4. DFSORT prints EFS messages to the message data set, but does not write messages to the master console.

Use the MSGPRT option to control the printing of messages returned by the EFS program. Use the LISTX and NOLISTX options to control the printing of control statements returned by the EFS program; use these two options in the same way you use LIST and NOLIST to control printing of DFSORT control statements. LISTX and NOLISTX can be used independently of LIST and NOLIST. When a SORTDIAG DD statement is specified, LISTX is used. If no verb request list is returned at Major Call 1, NOLISTX is used.

See z/OS DFSORT Application Programming Guide for more information about Extended Function Support.