diff --git a/erpnext/selling/doctype/sales_order/sales_order.py b/erpnext/selling/doctype/sales_order/sales_order.py
index 6b3abfd..cd44e3a 100755
--- a/erpnext/selling/doctype/sales_order/sales_order.py
+++ b/erpnext/selling/doctype/sales_order/sales_order.py
@@ -732,12 +732,12 @@
 @frappe.whitelist()
 def make_purchase_order_for_drop_shipment(source_name, for_supplier, target_doc=None):
 	def set_missing_values(source, target):
-		target.supplier = for_supplier
+		target.supplier = supplier
 		target.apply_discount_on = ""
 		target.additional_discount_percentage = 0.0
 		target.discount_amount = 0.0
 
-		default_price_list = frappe.get_value("Supplier", for_supplier, "default_price_list")
+		default_price_list = frappe.get_value("Supplier", supplier, "default_price_list")
 		if default_price_list:
 			target.buying_price_list = default_price_list
 
@@ -767,41 +767,61 @@
 		target.stock_qty = (flt(source.qty) - flt(source.ordered_qty)) * flt(source.conversion_factor)
 		target.project = source_parent.project
 
-	doclist = get_mapped_doc("Sales Order", source_name, {
-		"Sales Order": {
-			"doctype": "Purchase Order",
-			"field_no_map": [
-				"address_display",
-				"contact_display",
-				"contact_mobile",
-				"contact_email",
-				"contact_person",
-				"taxes_and_charges"
-			],
-			"validation": {
-				"docstatus": ["=", 1]
-			}
-		},
-		"Sales Order Item": {
-			"doctype": "Purchase Order Item",
-			"field_map":  [
-				["name", "sales_order_item"],
-				["parent", "sales_order"],
-				["stock_uom", "stock_uom"],
-				["uom", "uom"],
-				["conversion_factor", "conversion_factor"],
-				["delivery_date", "schedule_date"]
-			],
-			"field_no_map": [
-				"rate",
-				"price_list_rate"
-			],
-			"postprocess": update_item,
-			"condition": lambda doc: doc.ordered_qty < doc.qty and doc.supplier == for_supplier
-		}
-	}, target_doc, set_missing_values)
+	suppliers =[]
+	if for_supplier:
+		suppliers.append(for_supplier)
+	else:
+		sales_order = frappe.get_doc("Sales Order", source_name)
+		for item in sales_order.items:
+			if item.supplier and item.supplier not in suppliers:
+				suppliers.append(item.supplier)
+	for supplier in suppliers:
+		po =frappe.get_list("Purchase Order", filters={"sales_order":source_name, "supplier":supplier, "docstatus": ("<", "2")})
+		if len(po) == 0:
+			doc = get_mapped_doc("Sales Order", source_name, {
+				"Sales Order": {
+					"doctype": "Purchase Order",
+					"field_no_map": [
+						"address_display",
+						"contact_display",
+						"contact_mobile",
+						"contact_email",
+						"contact_person",
+						"taxes_and_charges"
+					],
+					"validation": {
+						"docstatus": ["=", 1]
+					}
+				},
+				"Sales Order Item": {
+					"doctype": "Purchase Order Item",
+					"field_map":  [
+						["name", "sales_order_item"],
+						["parent", "sales_order"],
+						["stock_uom", "stock_uom"],
+						["uom", "uom"],
+						["conversion_factor", "conversion_factor"],
+						["delivery_date", "schedule_date"]
+			 		],
+					"field_no_map": [
+						"rate",
+						"price_list_rate"
+					],
+					"postprocess": update_item,
+					"condition": lambda doc: doc.ordered_qty < doc.qty and doc.supplier == supplier
+				}
+			}, target_doc, set_missing_values)
+			if not for_supplier:
+				doc.insert()
+		else:
+			suppliers =[]
+	if suppliers:
+		if not for_supplier:
+			frappe.db.commit()
+		return doc
+	else:
+		frappe.msgprint(_("PO already created for all sales order items"))
 
-	return doclist
 
 @frappe.whitelist()
 def get_supplier(doctype, txt, searchfield, start, page_len, filters):
@@ -817,6 +837,8 @@
 			and ({key} like %(txt)s
 				or supplier_name like %(txt)s)
 			and name in (select supplier from `tabSales Order Item` where parent = %(parent)s)
+			and name not in (select supplier from `tabPurchase Order` po inner join `tabPurchase Order Item` poi
+			     on po.name=poi.parent where po.docstatus<2 and poi.sales_order=%(parent)s)			
 		order by
 			if(locate(%(_txt)s, name), locate(%(_txt)s, name), 99999),
 			if(locate(%(_txt)s, supplier_name), locate(%(_txt)s, supplier_name), 99999),