APO PP/DS atp check for planned orders with discontinued componentes (interchangeability groups)

[ws]

Hi,

I am having problem in following Scenario in APO PP/DS 7.4:

- interchangeability groups are used for phase-out of components.

in this scenario we are already after the phase-out date:

example:

phase-out component' stock is 10 pc.

18 pc are required for the 1st planned order on 15.1.. so atp check allocates the 10 pc for old and 8 pc for the new component. all good. afterwards there is no stock of old component, hence atp check for following planned orders should allocate the required qty only to the new component. but this is not happening...every atp check for following planned orders always considers the remaining stock qty of the phase-out component....which is wrong!

what is needed to maintain to make the atp check for planned orders to consider the remaining stock of phase-out component only for the first planned order? I would like the atp check to recognize the already "reserved" qty for a timely earlier planned order so that the atp check for following orders will recognize it and place the entire required qty to the new component.

any hints?

Walter