diff --git a/erpnext/stock/doctype/stock_entry/stock_entry.py b/erpnext/stock/doctype/stock_entry/stock_entry.py
index 69c624b..758fb37 100644
--- a/erpnext/stock/doctype/stock_entry/stock_entry.py
+++ b/erpnext/stock/doctype/stock_entry/stock_entry.py
@@ -328,6 +328,10 @@
 			completed_qty = d.completed_qty + (allowance_percentage/100 * d.completed_qty)
 			if total_completed_qty > flt(completed_qty):
 				job_card = frappe.db.get_value('Job Card', {'operation_id': d.name}, 'name')
+				if not job_card:
+					frappe.throw(_("Work Order {0}: job card not found for the operation {1}")
+						.format(self.work_order, job_card))
+
 				work_order_link = frappe.utils.get_link_to_form('Work Order', self.work_order)
 				job_card_link = frappe.utils.get_link_to_form('Job Card', job_card)
 				frappe.throw(_("Row #{0}: Operation {1} is not completed for {2} qty of finished goods in Work Order {3}. Please update operation status via Job Card {4}.")