Programming Considerations

The mapping macro IATYIDD PHASE=PST,TYPE=DSECT provides addressability to the data area that contains the LOCATE information.

Flag byte IDDLOCF1 in the data area mapped by IATYIDD and contains bits for the LOCATE request (IDDLOCW) and the LOCATE response message (IDDLOCRW). These bits are on when installation exit IATUX11 is entered; on exit, the user must turn the appropriate bit off if the messages are not to be printed.

Flags LRSFLG1 and LRSFLG3 in IATYLRS, pointed to by register 4, reveal if any error occurred. In such an event, message IAT4401 should not be suppressed, because it contains information about the original request.