Hi Ranjith,
in FORM interface you have only one word after type for declaration. So for tables you have to use a table type.
You cant say
FORM z TABLES x TYPE STANDARD TABLE OF y.
You have to dafeine a global declaration (in TOP include)
types: y_table TYPE STANDARD TABLE OF y.
And in FORM interface you can write
FORM z TABLES x TYPE y_table.
Regards,
Klaus