Can an user function return more than one BAT?

Hi,     I am looking for a way for a MAL user function to return more than one BAT without success.     Could you give me some help?     I tried the following way:         user.test(X_1:bat[:oid,:oid], X_2:bat[:oid,:int]):void;             sql.init();             X_0 := sql.mvc();             X_1 := sql.bind(...);             X_2 := sql.bind(...);         end test;         X1:bat[:oid,:oid] := bat.new(:oid,:oid);         X2:bat[:oid,:int] := bat.new(:oid,:int);         X_1:str := remote.put(url, X1);         X_2:str := remote.put(url, X2);         X_3:str := remote.exec(url, "user", "test", X_1, X_2);         X3:bat[:oid,:oid] := remote.get(url, X_1);         X4:bat[:oid,:int] := remote.get(url, X_2);         io.print(X3);         io.print(X4);