How to Troubleshoot 3PL ASN Rejections From Bad Carton IDs

A 3PL rejected our ASN file the night before a replenishment shipment. The portal error said invalid carton id, which was not very helpful. The cartons were labeled, the shipment existed, and the warehouse was ready. The real problem was that our export used internal carton sequence numbers while the 3PL expected the GS1-style carton label value printed on the box. I compared one rejected row…