I am doing Billing for scrap sale and for releasing that billing i clicked on that flag i am getting error "order is not carrying revenue" then i checked in KO02 it was not existing. then i find in co02 it was the production order. Now i am not getting any link b/w that order and wth my billing. Bcz that order has different order type/material but same plant. Now plz suggest me what i hv to do.