RMAN rename datafile created in an archivelog
SET NEWNAME works for RESTORE and SWITCH, but not for RECOVER. Datafiles had been renamed and switched before the recovery started.

There is a flaw in your process though, and the above issue is its side effect:


  Restore the control file from the 3/9 backup.


Why? You do a nearly complete recovery to get as close as possible to the current state, not the state on 3/9. Restore the controlfile from the latest backup taken on 3/14.


  Since the restored control files aren't aware of the backup pieces for 3/10 - 3/14, I run this for each


This step is unnecessary if you use the latest controlfile.