To check low margin while booking the order getting error

Hi All,

Working in EBS Version : 12.2.10

i have requirement to check low margin while booking the order

if it is multiple lines it shows errors

kindly see the screen shot below

this is my below query

 (select trunc(scsa_actc_cost(oel.inventory_item_id,oel.org_id) /(1- 

to_char((case when (iim.attribute2 in ('SBIN', 'WBIN')) then 25 

   when (iim.attribute2 not in ('SBIN', 'WBIN')) then 20

    end

 )) /100),2) sp

 from oe_order_lines_all oel, mtl_system_items_b iim

 where iim.organization_id = 94

 and iim.inventory_item_id = oel.inventory_item_id

 and oel.header_id = :line.header_id