This error message will show when you do not enter correct data for your shipment under Shipmentlines/Pakketinformatie. Add a package type through your source system/ERP program/WMS or in our portal with the button 'Add Packages/Pakketten Toevoegen'

Should you need further assistance with this issue, please do not hesitate to contact us at this link and please send us the reference of the shipment that you're experiencing issues with.