The number of non-operational page data sets exceeds the Warning threshold. Verify the paging devices are operational. If a device is not operational, attempt to VARY it online. If a page data set had been DRAINed by a prior PAGEDEL DRAIN command, it may now be removed by a PAGEDEL DELETE command. If this situation pops up without warning, an IPL is imminent. Prepare to shut down and immediately get help from a systems programmer.
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