RMAN Backup Gives RMAN-06091: No Channel Allocated for Maintenance

I really don’t want to turn this blog into an accumulation of issues and flaws. But as I explained many times before, the blog for me is also a way to dump information I likely will need the sooner or later again. Recently I blogged about another RMAN issue in Oracle 12.2.0.1 with traces. This was fixed with the July 2018 RU for Oracle 12.2.0.1. But the issue below about which Piero Ferraz from Brazil alerted me (thanks!!!), happens in exactly this RU. RMAN Backup Gives RMAN-06091: No Channel Allocated for Maintenance This issue gets introduced with the July 2018…