block payment for rejection

Hi All,

I have one requirement.

I have one inspection lot for 10 qty, during usage decision 7 qty is put in unrestricted stock and 3 qty rejected and put "in new material" and moved to rejection location. As we can mot make partila UD fo one lot, i have made UD as accepted under minor concession. Now requirment is that during paymenent to vendor system should not allow to do for 10 qty, it should allow for 7 qty as it is moved to unrestricted. How can I do this?

Plz advice.

Thanks,

Regards,

Mayur Patil