Re-Triggering ATP check for Sales Orders through program

Hi Experts,

I have a scenario in my project related to consignment scenario.

During the time of sales order creation if we don't get the confirmation and later on if the stock arrives we would like to re-trigger the ATP again for list of SO items which didn't get confirmation earlier.

Kindly note the ATP check is done with in ECC and not APO.

I tried using the BAPI_SALESORDER_CHANGE, the confirmation is happening for line items only when i update the ATP relevant fields like Requested Qty, Material or Plant.

Come across the standard T.Codes: V_RA, V_V2, COMAC & COHV but none of them suited my requirement.

However I would be interested in getting the SO items confirmed without changing any of the fields in the SO.

Your thoughts would be of great help.

Regards,

Srini.