Diagnosis
You want to go directly to the packing transaction, but have notselected a header line (sales order, stock transport order, delivery).All handling unit lines which you selected are ignored in this function

System Response

Procedure
Select a header line, and choose Pack online or Pack in thebackground, in order to access packing for the total quantity of allschedule lines for this order item.
If the header line you selected contains a delivery, the system onlyproposes the quantity of this delivery which still needs to be packed.If you change the quantity to be packed in the line which you selected,the changed quantity is copied to the packing transaction.