diff --git a/modules/purchase_trade/sale.py b/modules/purchase_trade/sale.py
index 1379bbc..04e8cd1 100755
--- a/modules/purchase_trade/sale.py
+++ b/modules/purchase_trade/sale.py
@@ -1209,8 +1209,9 @@ class SaleLine(metaclass=PoolMeta):
         unit_factor = Decimal(1)
         if self.linked_unit:
             source_unit = getattr(self, 'unit', None)
-            if not source_unit and self.product:
-                source_unit = self.product.sale_uom
+            product = getattr(self, 'product', None)
+            if not source_unit and product:
+                source_unit = product.sale_uom
             if not source_unit:
                 return factor
             Uom = Pool().get('product.uom')
diff --git a/modules/purchase_trade/stock.py b/modules/purchase_trade/stock.py
index 5744a9b..0a9253c 100755
--- a/modules/purchase_trade/stock.py
+++ b/modules/purchase_trade/stock.py
@@ -984,29 +984,30 @@ class ShipmentIn(metaclass=PoolMeta):
                         sale.invoice_address = sale.party.addresses[0]
                         sale.shipment_address = sale.party.addresses[0]
                     
-                    if sell_price_currency == 'USC':
-                        sale.currency = Currency.get_by_name('USD')
-                        sale_line.enable_linked_currency = True
-                        sale_line.linked_currency = 1
-                        sale_line.linked_unit = Uom.get_by_name(sell_price_unit)
-                        sale_line.linked_price = round(sell_price,4)
-                        sale_line.unit_price = sale_line.get_price_linked_currency()
-                    else:
-                        sale.currency = Currency.get_by_name(sell_price_currency)
-                        sale_line.unit_price = round(sell_price,4)
-                        sale_line.unit = Uom.get_by_name(sell_price_unit)
-                        sale_line.premium = premium
+                    if sell_price_currency == 'USC':
+                        sale.currency = Currency.get_by_name('USD')
+                        sale_line.enable_linked_currency = True
+                        sale_line.linked_currency = 1
+                        sale_line.linked_unit = Uom.get_by_name(sell_price_unit)
+                        sale_line.linked_price = round(sell_price,4)
+                    else:
+                        sale.currency = Currency.get_by_name(sell_price_currency)
+                        sale_line.unit_price = round(sell_price,4)
+                        sale_line.unit = Uom.get_by_name(sell_price_unit)
+                        sale_line.premium = premium
                     Sale.save([sale])
                     sale_line.sale = sale.id
-                    sale_line.quantity = round(lot_net_weight,2)
-                    sale_line.quantity_theorical = round(lot_net_weight,2)
-                    sale_line.product = Product.get_by_name('BRAZIL COTTON')
-                    logger.info("PRODUCT:%s",sale_line.product)
-                    sale_line.unit = Uom.get_by_name(lot_unit)
-                    sale_line.price_type = 'priced'
-                    sale_line.created_by_code = False
-                    sale_line.note = dec_key
-                    SaleLine.save([sale_line])
+                    sale_line.quantity = round(lot_net_weight,2)
+                    sale_line.quantity_theorical = round(lot_net_weight,2)
+                    sale_line.product = Product.get_by_name('BRAZIL COTTON')
+                    logger.info("PRODUCT:%s",sale_line.product)
+                    sale_line.unit = Uom.get_by_name(lot_unit)
+                    if sell_price_currency == 'USC':
+                        sale_line.unit_price = sale_line.get_price_linked_currency()
+                    sale_line.price_type = 'priced'
+                    sale_line.created_by_code = False
+                    sale_line.note = dec_key
+                    SaleLine.save([sale_line])
 
                     #need to link the virtual part to the shipment
                     lqt = LotQt.search([('lot_s','=',sale_line.lots[0])])
@@ -1068,7 +1069,7 @@ class ShipmentIn(metaclass=PoolMeta):
                     logger.info("ADD_LOT:%s",int(chunk_key))
                     LotQt.add_physical_lots(lqt,[l])
 
-            return inv_date,inv_nb
+        return inv_date,inv_nb
 
     def html_to_text(self,html_content):
         text = re.sub(r"<br\s*/?>", "\n", html_content, flags=re.IGNORECASE)
diff --git a/modules/purchase_trade/tests/test_module.py b/modules/purchase_trade/tests/test_module.py
index ed0ede8..91bf0a3 100644
--- a/modules/purchase_trade/tests/test_module.py
+++ b/modules/purchase_trade/tests/test_module.py
@@ -258,6 +258,17 @@ class PurchaseTradeTestCase(ModuleTestCase):
                 line.compute_unit_price(),
                 Decimal('123.45'))
 
+    def test_sale_line_linked_unit_factor_keeps_currency_factor_without_product(self):
+        'linked price conversion does not crash when automation builds a sale line before setting product'
+        SaleLine = Pool().get('sale.line')
+        line = SaleLine()
+        line.enable_linked_currency = True
+        line.linked_currency = Mock(factor=Decimal('2'))
+        line.linked_unit = Mock()
+        line.unit = None
+
+        self.assertEqual(line._get_linked_unit_factor(), Decimal('2'))
+
     def test_purchase_line_default_pricing_rule_comes_from_configuration(self):
         'purchase line pricing_rule defaults to the purchase_trade singleton value'
         PurchaseLine = Pool().get('purchase.line')