Message type: E = Error
Message class: VW - Shipment Processing Output
Message number: 391
Message text: The customs office is not valid for the transportation point country
You have tried to enter a customs office which has not been defined for
the country assigned to this point.
The system doesn't accept the entry.
Enter a permitted customs office (use F4 help) or leave the 'Customs
office' field blank.
Error message extract from SAP system. Copyright SAP SE.