db19c RMAN-03009 ORA-00245

This was not reinforced til around 19.19, but starting getting the following error during nightly backup:

RMAN-03009: failure of backup command on ORA_DISK_1 channel at 09/01/2023 05:01:07
ORA-00245: control file backup failed; in Oracle RAC, target might not be on shared storage

The solution is to change the snapshot control file from

CONFIGURE SNAPSHOT CONTROLFILE NAME TO '/u01/app/oracle/product/19.0.0.0/dbhome_6/dbs/snapcf_emdev1.f'; # default

to

CONFIGURE SNAPSHOT CONTROLFILE NAME TO '+RECO/snapcf_emdev.f';