RMAN-05000
CONFIGURE AUXNAME required for datafile string
Cause
Either: -) The control file mounted by the auxiliary database does not have an entry for this data file, therefore file name conversion is not possible.
-) A COPY DATAFILE TO AUXNAME command was issued, but no auxname was set for this data file.
Action
Use the CONFIGURE AUXNAME command to specify a file name that the auxiliary database can use as a restore destination.