Diagnosis
The fixed quantity indicator is set and the availability check couldnot confirm the item. In this situation it is unclear whether nothingshould be delivered to the customer, or whether the system shouldcreate a production order. For technical reasons it is not possible tocreate a temporary production order with a production quantity of 0.Therefore, the production order is not changed but the requirements aredeleted.

Procedure
You can clarify the situation as follows: If a delivery should not bemade, enter a reason for rejection in the item. This will delete theproduction order. If you do wish to try and deliver the quantity,deselect the fixed quantity indicator for the item.