Message Oracle RMAN-06438 - error executing package DBMS_RCVMAN in string database

ERRORerror executing package DBMS_RCVMAN in string database
CAUSERecovery Manager requires the DBMS_RCVMAN package in the SYS schema of the indicated database. Normally this package is installed during database creation. To re-create the package, run the files dbmsrman.sql and prvtrmns.plb.
ACTIONre-create the DBMS_RCVMAN package in the SYS schema.