The client discovered that, after upgrading their operating system from z/OS 1.13 to 2.1, their CA View duplex tapes are getting deleted.
The View database has ownership of the duplex tape, but their RMM system sees that same tape as scratch and available for rewrite.
View 12.0, 12.1, 12.2
The client had some user exits for RMM that did not get implemented under the new release of z/OS 2.1, which were in z/OS release 1.13
The client made corrections by implementing the RMM user exits in z/OS 2.1.