Restrictions

1. This macro may not be used before the completion of WLM address space initialization
2. The caller must have issued the IWMMSTRT macro successfully.
3. The caller is responsible for error recovery.
4. The current PSW key must be 0 or match the key specified on IWM4MCRE provided the latter is a system key (0-7).
5. The caller must serialize to prevent any delay monitoring services from being invoked concurrently for the environment represented by the monitoring token.