diff --git a/tienda_ilusion/don_confiao/admin.py b/tienda_ilusion/don_confiao/admin.py
index 1fb3fe4..6ca0f2a 100644
--- a/tienda_ilusion/don_confiao/admin.py
+++ b/tienda_ilusion/don_confiao/admin.py
@@ -21,6 +21,7 @@ class StoreSettingsAdmin(admin.ModelAdmin):
 @admin.register(Customer)
 class CustomerAdmin(admin.ModelAdmin):
     list_display = (
+        "id",
         "name",
         "email",
         "phone",
@@ -72,7 +73,7 @@ class CatalogSaleLineAdmin(admin.ModelAdmin):
 
 @admin.register(Product)
 class ProductAdmin(admin.ModelAdmin):
-    list_display = ("name", "price", "measuring_unit", "external_id")
+    list_display = ("id", "name", "price", "measuring_unit", "external_id")
     search_fields = ("id", "name",)
     list_filter = ("name", "id")
 
diff --git a/tienda_ilusion/don_confiao/services/tryton/customers.py b/tienda_ilusion/don_confiao/services/tryton/customers.py
index ffdf677..21eb3fa 100644
--- a/tienda_ilusion/don_confiao/services/tryton/customers.py
+++ b/tienda_ilusion/don_confiao/services/tryton/customers.py
@@ -15,7 +15,10 @@ class CustomerTrytonService:
         party_ids = self.client.call(method, params)
         tryton_parties = self._get_party_details(party_ids, context)
         
-        checked_tryton_parties = party_ids
+        checked_tryton_parties = [
+            {"id": p.get("id"), "name": p.get("name")}
+            for p in tryton_parties
+        ]
         failed_parties = []
         updated_customers = []
         created_customers = []
@@ -25,15 +28,35 @@ class CustomerTrytonService:
             try:
                 customer = Customer.objects.get(external_id=tryton_party.get("id"))
             except Customer.DoesNotExist:
-                customer = self._create_customer(tryton_party)
-                created_customers.append(customer.id)
-                continue
-            
-            if self._need_update(customer, tryton_party):
-                self._update_customer(customer, tryton_party)
-                updated_customers.append(customer.id)
-            else:
-                untouched_customers.append(customer.id)
+                try:
+                    customer = self._create_customer(tryton_party)
+                    created_customers.append(self._build_item(customer))
+                    continue
+                except Exception as e:
+                    print(
+                        f"Error al importar clientes: {e}El cliente: {tryton_party}"
+                    )
+                    failed_parties.append(
+                        self._build_failure(tryton_party, "crear", e)
+                    )
+                    continue
+
+            try:
+                if self._need_update(customer, tryton_party):
+                    changes = self._describe_changes(customer, tryton_party)
+                    self._update_customer(customer, tryton_party)
+                    updated_customers.append(
+                        {**self._build_item(customer), "detail": changes}
+                    )
+                else:
+                    untouched_customers.append(self._build_item(customer))
+            except Exception as e:
+                print(
+                    f"Error al importar clientes: {e}El cliente: {tryton_party}"
+                )
+                failed_parties.append(
+                    self._build_failure(tryton_party, "actualizar", e)
+                )
 
         return {
             "checked_tryton_parties": checked_tryton_parties,
@@ -43,6 +66,41 @@ class CustomerTrytonService:
             "untouched_customers": untouched_customers,
         }
 
+    def _build_item(self, customer):
+        """Construye el objeto de un cliente sincronizado"""
+        return {"id": customer.id, "name": customer.name}
+
+    def _describe_changes(self, customer, tryton_party):
+        """Describe los cambios detectados entre el cliente local y Tryton"""
+        changes = []
+        name = tryton_party.get("name")
+        if customer.name != name:
+            changes.append(f"Nombre: {customer.name} → {name}")
+        if tryton_party.get("addresses") and tryton_party.get("addresses")[0]:
+            new_address = str(tryton_party.get("addresses")[0])
+            if customer.address_external_id != new_address:
+                changes.append(
+                    f"Dirección: {customer.address_external_id} → {new_address}"
+                )
+        return ", ".join(changes)
+
+    def _build_failure(self, tryton_party, operation, exc):
+        """Construye el detalle de un cliente que falló al sincronizar"""
+        error = self._friendly_error(tryton_party, str(exc))
+        return {
+            "external_id": tryton_party.get("id"),
+            "name": tryton_party.get("name"),
+            "error": f"Error al {operation} cliente: {error}",
+        }
+
+    def _friendly_error(self, tryton_party, message):
+        """Traduce causas conocidas de error a mensajes legibles"""
+        if "name" in message and (
+            "not-null constraint" in message or "NOT NULL constraint" in message
+        ):
+            return "El cliente no tiene nombre en Tryton"
+        return message
+
     def _get_party_details(self, party_ids, context):
         """Obtiene detalles de clientes desde Tryton"""
         tryton_fields = ["id", "name", "addresses"]
diff --git a/tienda_ilusion/don_confiao/services/tryton/products.py b/tienda_ilusion/don_confiao/services/tryton/products.py
index 1510bba..e9c9ea4 100644
--- a/tienda_ilusion/don_confiao/services/tryton/products.py
+++ b/tienda_ilusion/don_confiao/services/tryton/products.py
@@ -21,7 +21,10 @@ class ProductTrytonService:
         product_ids = self.client.call(method, params)
         tryton_products = self._get_product_details(product_ids, context)
         
-        checked_tryton_products = product_ids
+        checked_tryton_products = [
+            {"id": p.get("id"), "name": p.get("name")}
+            for p in tryton_products
+        ]
         failed_products = []
         updated_products = []
         created_products = []
@@ -33,20 +36,33 @@ class ProductTrytonService:
             except Product.DoesNotExist:
                 try:
                     product = self._create_product(tryton_product)
-                    created_products.append(product.id)
+                    created_products.append(self._build_item(product))
                     continue
                 except Exception as e:
                     print(
                         f"Error al importar productos: {e}El producto: {tryton_product}"
                     )
-                    failed_products.append(tryton_product.get("id"))
+                    failed_products.append(
+                        self._build_failure(tryton_product, "crear", e)
+                    )
                     continue
 
-            if self._need_update(product, tryton_product):
-                self._update_product(product, tryton_product)
-                updated_products.append(product.id)
-            else:
-                untouched_products.append(product.id)
+            try:
+                if self._need_update(product, tryton_product):
+                    changes = self._describe_changes(product, tryton_product)
+                    self._update_product(product, tryton_product)
+                    updated_products.append(
+                        {**self._build_item(product), "detail": changes}
+                    )
+                else:
+                    untouched_products.append(self._build_item(product))
+            except Exception as e:
+                print(
+                    f"Error al importar productos: {e}El producto: {tryton_product}"
+                )
+                failed_products.append(
+                    self._build_failure(tryton_product, "actualizar", e)
+                )
 
         return {
             "checked_tryton_products": checked_tryton_products,
@@ -56,6 +72,59 @@ class ProductTrytonService:
             "untouched_products": untouched_products,
         }
 
+    def _build_item(self, product):
+        """Construye el objeto de un producto sincronizado"""
+        return {"id": product.id, "name": product.name}
+
+    def _describe_changes(self, product, tryton_product):
+        """Describe los cambios detectados entre el producto local y Tryton"""
+        changes = []
+        name = tryton_product.get("name")
+        if product.name != name:
+            changes.append(f"Nombre: {product.name} → {name}")
+        price = tryton_product.get("list_price")
+        if product.price != price:
+            changes.append(
+                f"Precio: {self._format_price(product.price)} → "
+                f"{self._format_price(price)}"
+            )
+        unit = tryton_product.get("default_uom.")
+        if unit:
+            unit_name = unit.get("rec_name")
+            if product.measuring_unit != unit_name:
+                changes.append(
+                    f"Unidad: {product.measuring_unit} → {unit_name}"
+                )
+        return ", ".join(changes)
+
+    @staticmethod
+    def _format_price(value):
+        """Formatea un precio sin ceros decimales innecesarios"""
+        return f"{value:.2f}".rstrip("0").rstrip(".")
+
+    def _build_failure(self, tryton_product, operation, exc):
+        """Construye el detalle de un producto que falló al sincronizar"""
+        error = self._friendly_error(tryton_product, str(exc))
+        return {
+            "external_id": tryton_product.get("id"),
+            "name": tryton_product.get("name"),
+            "error": f"Error al {operation} producto: {error}",
+        }
+
+    def _friendly_error(self, tryton_product, message):
+        """Traduce causas conocidas de error a mensajes legibles"""
+        if "price" in message and (
+            "not-null constraint" in message or "NOT NULL constraint" in message
+        ):
+            return "El producto no tiene precio en Tryton (list_price nulo)"
+        if "name" in message and (
+            "duplicate key" in message or "UNIQUE constraint" in message
+        ):
+            return (
+                f"Ya existe un producto con el nombre '{tryton_product.get('name')}'"
+            )
+        return message
+
     def _get_product_details(self, product_ids, context):
         """Obtiene detalles de productos desde Tryton"""
         tryton_fields = [
diff --git a/tienda_ilusion/don_confiao/services/tryton/sales.py b/tienda_ilusion/don_confiao/services/tryton/sales.py
index 4a71dd9..d895333 100644
--- a/tienda_ilusion/don_confiao/services/tryton/sales.py
+++ b/tienda_ilusion/don_confiao/services/tryton/sales.py
@@ -27,10 +27,10 @@ class SaleTrytonService:
                 external_ids = self.client.call(method, tryton_params)
                 sale.external_id = external_ids[0]
                 sale.save()
-                successful.append(sale.id)
+                successful.append(self._build_item(sale))
             except Exception as e:
                 print(f"Error al enviar la venta: {e}venta_id: {sale.id}")
-                failed.append(sale.id)
+                failed.append(self._build_failure(sale, e))
                 continue
 
         return {"successful": successful, "failed": failed}
@@ -61,16 +61,28 @@ class SaleTrytonService:
                 external_ids = self.client.call(method, tryton_params)
                 catalog_sale.external_id = external_ids[0]
                 catalog_sale.save()
-                successful.append(catalog_sale.id)
+                successful.append(self._build_item(catalog_sale))
             except Exception as e:
                 print(
                     f"Error al enviar catalog sale: {e}, catalog_sale_id: {catalog_sale.id}"
                 )
-                failed.append(catalog_sale.id)
+                failed.append(self._build_failure(catalog_sale, e))
                 continue
 
         return {"successful": successful, "failed": failed}
 
+    def _build_item(self, sale):
+        """Construye el objeto de una venta sincronizada"""
+        return {"id": sale.id, "code": sale.code}
+
+    def _build_failure(self, sale, exc):
+        """Construye el detalle de una venta que falló al sincronizar"""
+        return {
+            "id": sale.id,
+            "code": sale.code,
+            "error": f"Error al enviar la venta: {exc}",
+        }
+
     def _catalog_sale_to_tryton_params(self, catalog_sale, lines, tryton_context):
         """Convierte catalog sale a parámetros para Tryton"""
         sale_tryton = TrytonCatalogSale(catalog_sale, lines)
diff --git a/tienda_ilusion/don_confiao/tests/test_customers_from_tryton.py b/tienda_ilusion/don_confiao/tests/test_customers_from_tryton.py
index aec294f..3e1f24c 100644
--- a/tienda_ilusion/don_confiao/tests/test_customers_from_tryton.py
+++ b/tienda_ilusion/don_confiao/tests/test_customers_from_tryton.py
@@ -62,11 +62,25 @@ class TestCustomersFromTryton(TestCase, LoginMixin):
 
         content = json.loads(response.content.decode("utf-8"))
         expected_response = {
-            "checked_tryton_parties": [5, 6, 7, 8],
-            "created_customers": [3, 4],
-            "untouched_customers": [2],
+            "checked_tryton_parties": [
+                {"id": 5, "name": "Carlos"},
+                {"id": 6, "name": "Cristian"},
+                {"id": 7, "name": "Ana"},
+                {"id": 8, "name": "José"},
+            ],
+            "created_customers": [
+                {"id": 3, "name": "Ana"},
+                {"id": 4, "name": "José"},
+            ],
+            "untouched_customers": [{"id": 2, "name": "Cristian"}],
             "failed_parties": [],
-            "updated_customers": [1],
+            "updated_customers": [
+                {
+                    "id": 1,
+                    "name": "Carlos",
+                    "detail": "Nombre: Calos → Carlos, Dirección: None → 303",
+                }
+            ],
         }
         self.assertEqual(content, expected_response)
 
@@ -79,3 +93,115 @@ class TestCustomersFromTryton(TestCase, LoginMixin):
         self.assertEqual(updated_customer.external_id, str(5))
         self.assertEqual(updated_customer.name, "Carlos")
         self.assertIn(updated_customer.address_external_id, str(303))
+
+    @patch("sabatron_tryton_rpc_client.client.Client.call")
+    @patch("sabatron_tryton_rpc_client.client.Client.connect")
+    def test_create_failure_customer(self, mock_connect, mock_call):
+        def fake_call(*args, **kwargs):
+            party_search = "model.party.party.search"
+            search_args = [
+                [],
+                0,
+                1000,
+                [["name", "ASC"], ["id", None]],
+                {"company": 1},
+            ]
+
+            if args == (party_search, search_args):
+                return [5, 9]
+
+            party_read = "model.party.party.read"
+            read_args = (
+                [5, 9],
+                ["id", "name", "addresses"],
+                {"company": 1},
+            )
+            if args == (party_read, read_args):
+                return [
+                    {"id": 5, "name": "Carlos", "addresses": [303]},
+                    {"id": 9, "name": None, "addresses": []},
+                ]
+
+            raise Exception(
+                f"Sorry, args non expected on  this test: {args}"
+            )
+
+        mock_call.side_effect = fake_call
+
+        url = "/don_confiao/api/importar_clientes_de_tryton"
+        response = self.client.post(url)
+        self.assertEqual(response.status_code, 200)
+
+        content = json.loads(response.content.decode("utf-8"))
+        self.assertEqual(len(content["failed_parties"]), 1)
+        failure = content["failed_parties"][0]
+        self.assertEqual(failure["external_id"], 9)
+        self.assertEqual(failure["name"], None)
+        self.assertEqual(
+            failure["error"],
+            "Error al crear cliente: El cliente no tiene nombre en Tryton",
+        )
+        self.assertEqual(
+            content["updated_customers"],
+            [
+                {
+                    "id": 1,
+                    "name": "Carlos",
+                    "detail": "Nombre: Calos → Carlos, Dirección: None → 303",
+                }
+            ],
+        )
+
+    @patch("sabatron_tryton_rpc_client.client.Client.call")
+    @patch("sabatron_tryton_rpc_client.client.Client.connect")
+    def test_update_failure_customer(self, mock_connect, mock_call):
+        def fake_call(*args, **kwargs):
+            party_search = "model.party.party.search"
+            search_args = [
+                [],
+                0,
+                1000,
+                [["name", "ASC"], ["id", None]],
+                {"company": 1},
+            ]
+
+            if args == (party_search, search_args):
+                return [5, 6]
+
+            party_read = "model.party.party.read"
+            read_args = (
+                [5, 6],
+                ["id", "name", "addresses"],
+                {"company": 1},
+            )
+            if args == (party_read, read_args):
+                return [
+                    {"id": 5, "name": "Carlos", "addresses": [303]},
+                    {"id": 6, "name": None, "addresses": []},
+                ]
+
+            raise Exception(
+                f"Sorry, args non expected on  this test: {args}"
+            )
+
+        mock_call.side_effect = fake_call
+
+        url = "/don_confiao/api/importar_clientes_de_tryton"
+        response = self.client.post(url)
+        self.assertEqual(response.status_code, 200)
+
+        content = json.loads(response.content.decode("utf-8"))
+        self.assertEqual(len(content["failed_parties"]), 1)
+        failure = content["failed_parties"][0]
+        self.assertEqual(failure["external_id"], 6)
+        self.assertIn("Error al actualizar cliente", failure["error"])
+        self.assertEqual(
+            content["updated_customers"],
+            [
+                {
+                    "id": 1,
+                    "name": "Carlos",
+                    "detail": "Nombre: Calos → Carlos, Dirección: None → 303",
+                }
+            ],
+        )
diff --git a/tienda_ilusion/don_confiao/tests/test_exportar_ventas_para_tryton.py b/tienda_ilusion/don_confiao/tests/test_exportar_ventas_para_tryton.py
index da6657f..1213515 100644
--- a/tienda_ilusion/don_confiao/tests/test_exportar_ventas_para_tryton.py
+++ b/tienda_ilusion/don_confiao/tests/test_exportar_ventas_para_tryton.py
@@ -79,7 +79,13 @@ class TestSendSalesToTryton(TestCase, LoginMixin):
         self.assertEqual(response.status_code, 200)
         content = json.loads(response.content.decode("utf-8"))
         self.assertEqual(
-            content, {"successful": [self.sale.id], "failed": []}
+            content,
+            {
+                "successful": [
+                    {"id": self.sale.id, "code": self.sale.code}
+                ],
+                "failed": [],
+            },
         )
 
         updated_sale = Sale.objects.get(id=self.sale.id)
@@ -165,7 +171,15 @@ class TestSendSalesToTryton(TestCase, LoginMixin):
         content = json.loads(response.content.decode("utf-8"))
         self.assertEqual(
             content,
-            {"successful": [self.catalog_sale.id], "failed": []},
+            {
+                "successful": [
+                    {
+                        "id": self.catalog_sale.id,
+                        "code": self.catalog_sale.code,
+                    }
+                ],
+                "failed": [],
+            },
         )
 
         updated = CatalogSale.objects.get(id=self.catalog_sale.id)
@@ -247,3 +261,51 @@ class TestSendSalesToTryton(TestCase, LoginMixin):
             lines[1]["unit_price"],
             {"__class__": "Decimal", "decimal": "5000.00"},
         )
+
+    @patch("don_confiao.api.sales.get_tryton_client")
+    def test_send_sales_to_tryton_failure(self, mock_get_tryton_client):
+        mock_client = MagicMock()
+        mock_client.call.side_effect = Exception("error de tryton")
+        mock_get_tryton_client.return_value = mock_client
+
+        url = "/don_confiao/api/enviar_ventas_a_tryton"
+        response = self.client.post(url)
+
+        self.assertEqual(response.status_code, 200)
+        content = json.loads(response.content.decode("utf-8"))
+        self.assertEqual(content["successful"], [])
+        self.assertEqual(len(content["failed"]), 1)
+        failure = content["failed"][0]
+        self.assertEqual(failure["id"], self.sale.id)
+        self.assertEqual(failure["code"], self.sale.code)
+        self.assertEqual(
+            failure["error"], "Error al enviar la venta: error de tryton"
+        )
+
+        sale = Sale.objects.get(id=self.sale.id)
+        self.assertIsNone(sale.external_id)
+
+    @patch("don_confiao.api.sales.get_tryton_client")
+    def test_send_catalog_sales_to_tryton_failure(
+        self, mock_get_tryton_client
+    ):
+        mock_client = MagicMock()
+        mock_client.call.side_effect = Exception("error de tryton")
+        mock_get_tryton_client.return_value = mock_client
+
+        url = "/don_confiao/api/enviar_catalog_sales_a_tryton"
+        response = self.client.post(url)
+
+        self.assertEqual(response.status_code, 200)
+        content = json.loads(response.content.decode("utf-8"))
+        self.assertEqual(content["successful"], [])
+        self.assertEqual(len(content["failed"]), 1)
+        failure = content["failed"][0]
+        self.assertEqual(failure["id"], self.catalog_sale.id)
+        self.assertEqual(failure["code"], self.catalog_sale.code)
+        self.assertEqual(
+            failure["error"], "Error al enviar la venta: error de tryton"
+        )
+
+        catalog_sale = CatalogSale.objects.get(id=self.catalog_sale.id)
+        self.assertIsNone(catalog_sale.external_id)
diff --git a/tienda_ilusion/don_confiao/tests/test_products_from_tryton.py b/tienda_ilusion/don_confiao/tests/test_products_from_tryton.py
index 6f122c2..33300f3 100644
--- a/tienda_ilusion/don_confiao/tests/test_products_from_tryton.py
+++ b/tienda_ilusion/don_confiao/tests/test_products_from_tryton.py
@@ -92,11 +92,21 @@ class TestProductsFromTryton(TestCase, LoginMixin):
 
         content = json.loads(response.content.decode("utf-8"))
         expected_response = {
-            "checked_tryton_products": [190, 191, 192],
-            "created_products": [3],
-            "untouched_products": [2],
+            "checked_tryton_products": [
+                {"id": 190, "name": "Producto 1"},
+                {"id": 191, "name": "Panela2"},
+                {"id": 192, "name": "Papa"},
+            ],
+            "created_products": [{"id": 3, "name": "Producto 1"}],
+            "untouched_products": [{"id": 2, "name": "Papa"}],
             "failed_products": [],
-            "updated_products": [1],
+            "updated_products": [
+                {
+                    "id": 1,
+                    "name": "Panela2",
+                    "detail": "Nombre: Panela → Panela2, Precio: 5000 → 6000, Unidad: UNIT → Unit",
+                }
+            ],
         }
         self.assertEqual(content, expected_response)
 
@@ -165,10 +175,139 @@ class TestProductsFromTryton(TestCase, LoginMixin):
 
         content = json.loads(response.content.decode("utf-8"))
         expected_response = {
-            "checked_tryton_products": [200],
+            "checked_tryton_products": [{"id": 200, "name": "Panela"}],
             "created_products": [],
             "untouched_products": [],
-            "failed_products": [200],
+            "failed_products": [
+                {
+                    "external_id": 200,
+                    "name": "Panela",
+                    "error": "Error al crear producto: Ya existe un producto con el nombre 'Panela'",
+                }
+            ],
             "updated_products": [],
         }
         self.assertEqual(content, expected_response)
+
+    @patch("sabatron_tryton_rpc_client.client.Client.call")
+    @patch("sabatron_tryton_rpc_client.client.Client.connect")
+    def test_import_null_price_product(self, mock_connect, mock_call):
+        mock_connect.return_value = None
+
+        def fake_call(*args, **kwargs):
+            product_search = "model.product.product.search"
+            search_args = [
+                [["salable", "=", True]],
+                0,
+                1000,
+                [["rec_name", "ASC"], ["id", None]],
+                {"company": 1},
+            ]
+            if args == (product_search, search_args):
+                return [201]
+
+            product_read = "model.product.product.read"
+            product_args = (
+                [201],
+                [
+                    "id",
+                    "name",
+                    "default_uom.id",
+                    "default_uom.rec_name",
+                    "list_price",
+                ],
+                {"company": 1},
+            )
+            if args == (product_read, product_args):
+                return [
+                    {
+                        "id": 201,
+                        "list_price": None,
+                        "name": "ENVASES Y EMPAQUES",
+                        "default_uom.": {"id": 1, "rec_name": "Unit"},
+                    },
+                ]
+
+            raise Exception(
+                f"Sorry, args non expected on  this test: {args}"
+            )
+
+        mock_call.side_effect = fake_call
+
+        url = "/don_confiao/api/importar_productos_de_tryton"
+        response = self.client.post(url)
+        self.assertEqual(response.status_code, 200)
+
+        content = json.loads(response.content.decode("utf-8"))
+        self.assertEqual(content["created_products"], [])
+        self.assertEqual(len(content["failed_products"]), 1)
+        failure = content["failed_products"][0]
+        self.assertEqual(failure["external_id"], 201)
+        self.assertEqual(failure["name"], "ENVASES Y EMPAQUES")
+        self.assertEqual(
+            failure["error"],
+            "Error al crear producto: El producto no tiene precio en Tryton (list_price nulo)",
+        )
+
+    @patch("sabatron_tryton_rpc_client.client.Client.call")
+    @patch("sabatron_tryton_rpc_client.client.Client.connect")
+    def test_update_failure_products(self, mock_connect, mock_call):
+        mock_connect.return_value = None
+
+        def fake_call(*args, **kwargs):
+            product_search = "model.product.product.search"
+            search_args = [
+                [["salable", "=", True]],
+                0,
+                1000,
+                [["rec_name", "ASC"], ["id", None]],
+                {"company": 1},
+            ]
+            if args == (product_search, search_args):
+                return [191, 192]
+
+            product_read = "model.product.product.read"
+            product_args = (
+                [191, 192],
+                [
+                    "id",
+                    "name",
+                    "default_uom.id",
+                    "default_uom.rec_name",
+                    "list_price",
+                ],
+                {"company": 1},
+            )
+            if args == (product_read, product_args):
+                return [
+                    {
+                        "id": 191,
+                        "list_price": Decimal("6000"),
+                        "name": "Panela",
+                        "default_uom.": None,
+                    },
+                    {
+                        "id": 192,
+                        "list_price": Decimal("4500"),
+                        "name": "Papa",
+                        "default_uom.": {"id": 2, "rec_name": "Kilogram"},
+                    },
+                ]
+
+            raise Exception(
+                f"Sorry, args non expected on  this test: {args}"
+            )
+
+        mock_call.side_effect = fake_call
+
+        url = "/don_confiao/api/importar_productos_de_tryton"
+        response = self.client.post(url)
+        self.assertEqual(response.status_code, 200)
+
+        content = json.loads(response.content.decode("utf-8"))
+        self.assertEqual(len(content["failed_products"]), 1)
+        failure = content["failed_products"][0]
+        self.assertEqual(failure["external_id"], 191)
+        self.assertEqual(failure["name"], "Panela")
+        self.assertIn("Error al actualizar producto", failure["error"])
+        self.assertEqual(content["untouched_products"], [{"id": 2, "name": "Papa"}])