[Bug Fix] #638815: Subcontracting: actionable error for blank Subc. Location Code on WIP transfers

src/Apps/W1/Subcontracting/App/src/Transfer/SubcCreateTransfOrder.Report.al

@@ -558,7 +558,7 @@ report 99001501 "Subc. Create Transf. Order"
         GetTransferToLocationCodeForPurchaseHeader(PurchaseHeader, VendorFromPurchOrder, TransferToLocationCode);
 
         if TransferToLocationCode = '' then
-            exit(false);
+            VendorFromPurchOrder.TestField("Subc. Location Code");
 
         PostedWIPQtyBase := GetWIPQtyBase(PurchaseLine, TransferToLocationCode);
 

src/Apps/W1/Subcontracting/Test/Tests/SubcWIPTransCreateTest.Codeunit.al

@@ -1467,6 +1467,67 @@ codeunit 149911 "Subc. WIP Trans. Create Test"
             'WIP Transfer Line description must not be cleared when Direct Transfer is enabled on the header.');
     end;
 
+    [Test]
+    [HandlerFunctions('DoNotConfirmShowCreatedPurchOrderForSubcontracting')]
+    procedure WIPTransferCreationFailsWithTestFieldErrorWhenSubcLocationBlank()
+    var
+        Item: Record Item;
+        MachineCenter: array[2] of Record "Machine Center";
+        ProductionOrder: Record "Production Order";
+        PurchaseHeader: Record "Purchase Header";
+        PurchaseLine: Record "Purchase Line";
+        Vendor: Record Vendor;
+        WorkCenter: array[2] of Record "Work Center";
+        PurchaseHeaderPage: TestPage "Purchase Order";
+    begin
+        // [FEATURE] WIP Item Transfer for Subcontracting
+        // [SCENARIO 638815] When both the Vendor "Subc. Location Code" and the Purchase Header
+        // "Subc. Location Code" are blank, creating a WIP Transfer Order must raise a TestField
+        // error on Vendor "Subc. Location Code" instead of the generic "Nothing to create" error.
+
+        // [GIVEN] Complete subcontracting setup with Transfer WIP Item = true on the routing line
+        Initialize();
+
+        // [GIVEN] Work centers, machine centers, item with routing + BOM
+        SubcWarehouseLibrary.CreateAndCalculateNeededWorkAndMachineCenter(WorkCenter, MachineCenter, true);
+        SubcWarehouseLibrary.CreateItemForProductionIncludeRoutingAndProdBOM(Item, WorkCenter, MachineCenter);
+        SetTransferWIPItemOnRoutingLine(Item."Routing No.", WorkCenter[2]."No.", true);
+
+        // [GIVEN] Create and refresh released production order at the components location
+        LibraryManufacturing.CreateProductionOrder(
+            ProductionOrder, "Production Order Status"::Released,
+            ProductionOrder."Source Type"::Item, Item."No.", LibraryRandom.RandInt(10) + 5);
+        SetProdOrderLocationToCompSetupLocationAndRefresh(ProductionOrder);
+
+        // [GIVEN] Create Subcontracting Purchase Order from Prod. Order Routing
+        // (vendor already has a Subc. Location Code from CreateAndCalculateNeededWorkAndMachineCenter,
+        //  so the purchase header inherits it; we will clear both afterwards)
+        SubcontractingMgmtLibrary.CreateSubcontractingOrderFromProdOrderRtngPage(Item."Routing No.", WorkCenter[2]."No.");
+
+        PurchaseLine.SetRange("Document Type", PurchaseLine."Document Type"::Order);
+        PurchaseLine.SetRange("Prod. Order No.", ProductionOrder."No.");
+        PurchaseLine.FindFirst();
+        PurchaseHeader.Get(PurchaseLine."Document Type", PurchaseLine."Document No.");
+
+        // [GIVEN] Both the Vendor "Subc. Location Code" and the Purchase Header "Subc. Location Code" are cleared
+        Vendor.Get(WorkCenter[2]."Subcontractor No.");
+        Vendor."Subc. Location Code" := '';
+        Vendor.Modify();
+
+        PurchaseHeader."Subc. Location Code" := '';
+        PurchaseHeader.Modify();
+
+        // [WHEN] Attempting to create a Transfer Order to the Subcontractor
+        PurchaseHeaderPage.OpenView();
+        PurchaseHeaderPage.GoToRecord(PurchaseHeader);
+        asserterror PurchaseHeaderPage.CreateTransfOrdToSubcontractor.Invoke();
+
+        // [THEN] A targeted TestField error on "Subc. Location Code" is raised
+        //        (not the generic "Nothing to create" error — that is the current, unfixed behaviour)
+        Assert.ExpectedErrorCode('TestField');
+        Assert.ExpectedError('Subcontracting Location Code');
+    end;
+
     [PageHandler]
     procedure HandleTransferOrder(var TransfOrderPage: TestPage "Transfer Order")
     begin