Try:
SELECT T0.[CardName] AS 'Supplier',T0.[DocNum] AS 'PO', T0.[NumAtCard] AS 'Ship Code', T0.[TaxDate] AS 'Original Ship Date', T0.[DocDueDate] AS 'Actual Ship Date', T1.[ItemCode] AS 'Item Code', T1.[Dscription] AS 'Item Name', T1.[WhsCode] AS 'Whse', T1.[Quantity] AS 'Ctn Qty',T1.[U_UQtyUnit] AS 'Unit Qty', T2.[TrnspName] AS 'Shipment Type' FROM OPOR T0 INNER JOIN POR1 T1 ON T0.DocEntry = T1.DocEntry left JOIN OSHP T2 ON T0.TrnspCode = T2.TrnspCode WHERE T0.[DocStatus] ='o' and T0.[DocType] ='I'