Oracle - donde esta el error?

Hola tengo esto:

CREATE OR REPLACE PROCEDURE agregaEsquema (directorio IN varchar2,identificador IN varchar2,nombre IN varchar2,scr IN varchar2, exten IN varchar2, document IN varcahar2,autor IN varchar2 ) as
sc clob;
sc_file bfile;
ex blob;
ex_file bfile;
dc clob;
dc_file bfile;
BEGIN
sc_file := bfilename(directorio, scr);
ex_file := bfilename(directorio, exten);
dc_file := bfilename(directorio, document);

INSERT INTO ESQ_BD VALUES ( identificador, nombre, empty_clob(),empty_blob(),empty_clob(),autor)
RETURNING Script into sc,
RETURNING Extensional into ex,
RETURNING Docum into dc;

dbms_lob.fileopen(sc_file,dbms_lob.file_readonly);
dbms_lob.fileopen(ex_file,dbms_lob.file_readonly);
dbms_lob.fileopen(dc_file,dbms_lob.file_readonly);

dbms_lob.loadfromfile( sc, sc_file, dbms_lob.getlength (sc_file) );
dbms_lob.loadfromfile( ex, ex_file, dbms_lob.getlength (ex_file) );
dbms_lob.loadfromfile( dc, dc_file, dbms_lob.getlength (dc_file) );

dbms_lob.fileclose(sc_file);
dbms_lob.fileclose(ex_file);
dbms_lob.fileclose(dc_file);
commit;
END;


esto me da erro en el returning sabeis porque????

INSERT INTO ESQ_BD VALUES ( identificador, nombre, empty_clob(),empty_blob(),empty_clob(),autor)
RETURNING Script into sc; (Tenias comas simples)
RETURNING Extensional into ex; (Tenias comas simples)
RETURNING Docum into dc;