Hallo,
die Meldung ist völlig normal:
Problem Summary:
During backup, the following message is received: CPI1466 - Job holds large number of locks.

Resolution:
The backup job issues a CPI1466 to the QSYSOPR message queue and QHST. This is not a problem. Informational APAR II09173 documents this message. Backups require a lock on each of the objects being saved. You can see this message on one system and not on others as it is data dependent (dependent upon the number of objects saved).

References:
Informational APAR II09173:

iSeries and AS/400 Technical Support



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