Need Function help

[noob2012]

Need help on function

I am trying to understand how function X calling a remote database function Y and this is my code. It's not working. What am I doing wrong?

Function X

CREATE OR REPLACE FUNCTION XAV(v_input IN Varchar2)
RETURN return varchar2 AS
x varchar2(100);
BEGIN
x:= VAX@RMT(v_input);
END;

Function Y on RMT remote database

CREATE OR REPLACE FUNCTION VAX(vAB IN Varchar2)
RETURN varchar2 AS
BEGIN
if vAB = 'A' then return 'Andrew';
elsif vAB = 'B' then return 'Bob';
else return 'Cat';
end if;
END;

I know Function Y on the RMT database works. But if I run Function X, it gives me

ORA-06503: PL/SQL: Function returned without value
ORA-06512: at XAV, line 6
ORA-06512: at line 7

[debasisdas]

this should work for you.

CREATE OR REPLACE FUNCTION XAV(v_input IN Varchar2)
RETURN return varchar2 AS
x varchar2(100);
BEGIN
x:= VAX@RMT(v_input);
RETURN X;
END;