Call a HANA procedure from a SQL based calculation view

Hi All,

I created a HANA procedure, but when I try to call it from a SQL based calculation view as below:

BEGIN

CALL "_SYS_BIC"."ERP/SPR_GEO"('APAC', v_region);

var_out := v_region;

END

I got error:

some out table var is not assigned: VAR_OUT.

Thanks for help.