RMAN-06444
error creating string
Cause
During the CREATE CATALOG or UPGRADE CATALOG command, the indicated object could not be created due to errors.
Action
Make sure that the RECOVER.BSQ file has not been modified or damaged, and then if this error persists, contact Oracle Support Services If the error refers to one of the RMAN PL/SQL packages, connect to the recovery catalog owner and query the USER_ERRORS view to find out the details of the compilation errors.