Nested table update gets ORA-00904 with ExecuteSQL, error-free in TOAD

Question

I'm trying to run an UPDATE query through the ExecuteSQL method
of the oraDatabase object. The catch seems to be that this one
affects a nested table (field to be updated is a table itself).
This SQL runs perfectly in T.O.A.D. ...
UPDATE B457.AIRLINE a SET
a.rental_cust_code=B457.RENTCUSTCODELIST(rentcustcodes
('45645'),rentcustcodes('1234'),rentcustcodes('234234')) WHERE
a.AIRLINE_CODE='RCR'
...but, it produces the "SQL execution error, ORA-00904: invalid
column name" when run using ExecuteSQL.
Do I need to use a different syntax?

Answer 1

and the complete example
SQL> create or replace TYPE t_indirizzo AS OBJECT (
  2  via VARCHAR(45),
  3  numero NUMBER,
  4  cap INTEGER(5),
  5  citta VARCHAR(30),
  6  provincia VARCHAR(30),
  7  regione VARCHAR(30)
  8  );
  9  /
Type created.
SQL>
SQL>
SQL> create or replace TYPE t_telefono AS OBJECT (
  2  num_tel NUMBER(15)
  3  );
  4  /
Type created.
SQL>
SQL> create or replace TYPE t_listaTelefono AS TABLE OF t_telefono
  2  /
Type created.
SQL>
SQL> create or replace TYPE t_cliente AS OBJECT (
  2  cod_cliente NUMBER(8),
  3  indirizzo t_indirizzo,
  4  email VARCHAR(30),
  5  telefono t_listaTelefono
  6  ) NOT FINAL;
  7  /
Type created.
SQL>
SQL> CREATE TABLE cliente OF t_cliente(
  2  cod_cliente NOT NULL,
  3  indirizzo NOT NULL,
  4  email NOT NULL,
  5  PRIMARY KEY (cod_cliente)
  6  ) nested table telefono store as numTelCli_tab
  7  return as value
  8  /
Table created.
SQL>