Among the various program.interrupts, 4 of them can be disabled (arithmetic overflow or underflow). MVS will ignore these interrupts when it is disabled. PCFLIH determine if there is a SPIE set up by user to handle the specific types of interrupt and passes control to it if it does. This thereise PCFLIH passes control to OS EXIT routine will will generate a dump if SYSABEND or SYSDUMP DD card is specified.
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