Getting error at BEGIN while executing Funtion

Hi ,

I am trying to execute the function given in HANA Sql script reference.I am getting below error at step BEGIN  even the code syntax looks fine

CREATE FUNCTION func_addmul(x Double, y Double)

RETURNS result_add Double, result_mul Double

LANGUAGE SQLSCRIPT READS SQL DATA AS

BEGIN

     result_add := + :y

     result_mul := * :y;

END;

Error :

Could not execute 'CREATE FUNCTION func_addmul(x Double, y Double) RETURNS result_add Double, result_mul Double ...' in 1 ms 742 µs . SAP DBTech JDBC: [257] (at 136): sql syntax error: incorrect syntax near "BEGIN": line 4 col 2 (at pos 136)

I am using  VERSION 1.00.47.372360

Is there any valid reason behind this error and how to proceed? Please help