NonStop Systems are not configured with the number of processors expected . From a system configuration perspective, the operating system is always ready to accept (software wise) a maximum of 16 processors.
MOMI, every time is it started, uses the numerically highest 'up' processor in the system as the number of processors for up/down determination. For example, if the numerically highest 'up' processor is 5, which indicates 6 CPUs numbered 0 through 5, and processor 4 crashes, processor 4 is reported as down.
Additional processors added to the system while MOMI is operating automatically increase the numerically highest 'up' processor determination. In the above example, if an additional two processors were added, processors 6 and 7, MOMI now assumes the system is 8 processors numbered 0 through 7.
If processors are removed from the system 'on-line', i.e. without a cold-load, restart MOMI to force a new up/down calculation.
If processors are removed from within the system, for example CPUs 2 & 3 in a six processors system, and it is necessary to operate the system in that manner for a period of time, the CONFMOMI keyword CPU-NOT-PRESENT may be used to indicate to MOMI the CPUS that are expected to be down. Be sure and remove this keyword when the system configuration is restored to normal.