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