Limit PO : Enter a period for which you require this item

Hi Experts,

I am trying to create a Limit PO programatically using "BAPI_POEC_CREATE",

i have filled all the necessary tables Item, partner,Org data , account assignment.

However I did not find any field in BAPI_PO_ITEM_D structure where i can specify the period/duration for this limit PO.

There is only one field DELIV_DATE to mention the delivery date.

When i fill this i am getting an error "Enter a period for which you require this item".

Any solution to this error?

Regards,

Ashish Shah