If the program is in AR mode, issue the SYSSTATE ASCENV=AR macro before IXCMSGC. SYSSTATE ASCENV=AR tells the system to generate code appropriate for AR mode.

Include the mapping macro IXCYMQAA in your program to map the data returned in ANSAREA when using the IXCMSGC REQUEST=QUERYMSG service. Use the length and offsets provided in the IXCYMQAA records to ensure compatibility with additional data provided in the future.

Note that some request options are valid only when running in task mode, or when running as a message user routine or as a message notify user routine.