diff --git a/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py b/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py
index b99d75e..1d80184 100644
--- a/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py
+++ b/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py
@@ -246,7 +246,7 @@
 				and (not item.po_detail or
 					not frappe.db.get_value("Purchase Order Item", item.po_detail, "delivered_by_supplier")):
 
-				if self.update_stock and (not item.from_warehouse):
+				if self.update_stock and item.warehouse and (not item.from_warehouse):
 					if for_validate and item.expense_account and item.expense_account != warehouse_account[item.warehouse]["account"]:
 						msg = _("Row {0}: Expense Head changed to {1} because account {2} is not linked to warehouse {3} or it is not the default inventory account").format(
 							item.idx, frappe.bold(warehouse_account[item.warehouse]["account"]), frappe.bold(item.expense_account), frappe.bold(item.warehouse))
@@ -657,7 +657,7 @@
 								)
 								gl_entries.append(
 									self.get_gl_dict({
-										"account": self.get_company_default("exchange_gain_loss_account"),		
+										"account": self.get_company_default("exchange_gain_loss_account"),
 										"against": self.supplier,
 										"credit": discrepancy_caused_by_exchange_rate_difference,
 										"cost_center": item.cost_center,
@@ -1193,7 +1193,7 @@
 			purchase_receipts_or_invoices.append(item.get(doc_reference))
 		if item.get(items_reference):
 			items.append(item.get(items_reference))
-	
+
 	exchange_rate_map = frappe._dict(frappe.get_all(parent_doctype, filters={'name': ('in',
 		purchase_receipts_or_invoices)}, fields=['name', 'conversion_rate'], as_list=1))