You have a sales contract with full confirmation and the allocation assignment is correct in transaction /SAPAPO/ATPQ_CHKCUST on APO side to the full confirmation quantity. Once a sales order is created with reference to this contract with a lower requested quantity, the allocation assignment for the remaining quantity of the contract was deleted.
In transaction /SAPAPO/ATPQ_CHKCUST there is no more allocation assignment for the remaining quantity of the contract item, there is only allocation assignment for the sales order item.
SAP Supply Chain Management
SAP SCM APO Global Available-to-Promise (gATP)
predecessor, successor, contract, reference, sales order, product allocation assignment, full confirmation, deleted, remaining quantity , KBA , SCM-APO-ATP-BF-PAL , Check against Product Allocations , Problem
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