Messages

z/OS issues messages from z/OS elements, features, program products, and application programs running on the system.

The system issues messages in different ways and to different locations:

Automated messaging services automatically react to certain messages.
Most messages are issued through WTO and WTOR macros to one of these locations:
- Console
- Hard-copy log
- Job log
- SYSOUT data set
Routing codes determine where the messages are displayed or printed. The routing codes for messages issued by the operating system are included with each message.
Unless specified otherwise, messages, in general, go to the system log (SYSLOG).
Dump messages are issued through the dumping services routines and can display in:
- SVC dumps, stand-alone dumps, or SYSMDUMP ABEND dumps formatted by the interactive problem control system (IPCS)
- Trace data sets formatted by the interactive problem control system (IPCS)
- ABEND dumps or SNAP dumps produced by the dumping services
In dump or trace data sets formatted by IPCS, the messages appear interactively on a terminal or in a printed dump.
Some messages are issued through DFSMS/MVS™ access methods directly to one of these locations:
- Output data set
- Display terminal