Diagnosis
You are trying to process or display several handling units (HUs) atthe same time. Processing HUs can include either packing or unpackingtransactions. The message is cancelled by different references forthe individual handling units.
One of the following reasons may be responsible for you not being ableto process the handling unit:
You are trying to simultaneously process HUs which have references todifferent documents (sales order/scheduling agreement,stock transport order/scheduling agreement or delivery). The documentitems must also be identical.
You are trying to pack another material for a HU. This HU already has areference to a sales order, an order or a delivery.
You are already processing a HU with reference and want to pack morematerial into a newly created HU.

Procedure
It is not possible to process HUs with different references at thesame time. If it is necessary to process these HUs, you must firstlydelete the existing references for the sales order, order or delivery.
HUs without reference can therefore not be processed any further usingtransaction VL10HU.