If you receive the following error message (An Error Occurred when attempting to: When Creating ProCarrier Shipment! Error:Unable to Create DG Shipment Error:Invalid Consignee State) when shipping with Pro Carrier (DG) it means the correct state name hasn't been entered in the County field. The County field will be used in the place of State, Province or Region.
Once this has been corrected, please retry generating the shipment.