Diagnosis
You have used a combination of different itemtypes within one documentthat might cause problems in reporting. Only the following types shouldbe combined within the same document:
itemtype 31 - Subcontracting component shipment item - and
itemtype 33 - Subcontracting component symbolic shipment item or
itemtype 21 - Returnable packaging shipment item - and any otheritemtype.
If you have chosen a combination of types 31 and 33, then the item withtype 31 should always be the first item in the Nota Fiscal (main item).