Message Oracle RMAN-00574 - rman aborting due to errors reading/writing DBMS_PIPE

ERRORrman aborting due to errors reading/writing DBMS_PIPE
CAUSERMAN was run with input/output being sent to DBMS_PIPE. An error was encountered while reading from or writing to the pipe. This error should be preceded by information describing the error.
ACTIONRMAN terminates. Refer to the cause/action for the preceding errors.