diff --git a/erpnext/__init__.py b/erpnext/__init__.py
index cee8864..2109792 100644
--- a/erpnext/__init__.py
+++ b/erpnext/__init__.py
@@ -2,7 +2,7 @@
 from __future__ import unicode_literals
 import frappe
 
-__version__ = '7.2.0'
+__version__ = '7.2.1'
 
 def get_default_company(user=None):
 	'''Get default company for user'''
diff --git a/erpnext/selling/sales_common.js b/erpnext/selling/sales_common.js
index fc3cb3d..7ddf45d 100644
--- a/erpnext/selling/sales_common.js
+++ b/erpnext/selling/sales_common.js
@@ -212,7 +212,7 @@
 					item_code: item.item_code,
 					warehouse: item.warehouse,
 					qty: item.qty,
-					serial_no:item.serial_no
+					serial_no: item.serial_no || ""
 				},
 				callback:function(r){
 					if (inList(['Delivery Note', 'Sales Invoice'], doc.doctype)) {
diff --git a/erpnext/stock/doctype/delivery_note_item/delivery_note_item.json b/erpnext/stock/doctype/delivery_note_item/delivery_note_item.json
index 1cb0fcd..e1ac06e 100644
--- a/erpnext/stock/doctype/delivery_note_item/delivery_note_item.json
+++ b/erpnext/stock/doctype/delivery_note_item/delivery_note_item.json
@@ -1691,7 +1691,7 @@
  "issingle": 0, 
  "istable": 1, 
  "max_attachments": 0, 
- "modified": "2016-11-23 12:33:37.728117", 
+ "modified": "2016-12-24 12:33:37.728117", 
  "modified_by": "Administrator", 
  "module": "Stock", 
  "name": "Delivery Note Item", 
diff --git a/erpnext/stock/get_item_details.py b/erpnext/stock/get_item_details.py
index 7bcad08..0ed6952 100644
--- a/erpnext/stock/get_item_details.py
+++ b/erpnext/stock/get_item_details.py
@@ -384,7 +384,7 @@
 	return {'serial_no': serial_no}
 	
 @frappe.whitelist()
-def get_bin_details_and_serial_nos(item_code, warehouse, qty, serial_no):
+def get_bin_details_and_serial_nos(item_code, warehouse, qty=None, serial_no=None):
 	bin_details_and_serial_nos = {}
 	bin_details_and_serial_nos.update(get_bin_details(item_code, warehouse))
 	bin_details_and_serial_nos.update(get_serial_no_details(item_code, warehouse, qty, serial_no))