disable no copy for po number, po date on sales order
diff --git a/erpnext/selling/doctype/sales_order/sales_order.json b/erpnext/selling/doctype/sales_order/sales_order.json
index 888a231..707f6c4 100644
--- a/erpnext/selling/doctype/sales_order/sales_order.json
+++ b/erpnext/selling/doctype/sales_order/sales_order.json
@@ -372,7 +372,7 @@
    "in_list_view": 0, 
    "label": "Customer's Purchase Order", 
    "length": 0, 
-   "no_copy": 1, 
+   "no_copy": 0, 
    "oldfieldname": "po_no", 
    "oldfieldtype": "Data", 
    "permlevel": 0, 
@@ -403,7 +403,7 @@
    "in_list_view": 0, 
    "label": "Customer's Purchase Order Date", 
    "length": 0, 
-   "no_copy": 1, 
+   "no_copy": 0, 
    "oldfieldname": "po_date", 
    "oldfieldtype": "Date", 
    "permlevel": 0, 
@@ -3226,7 +3226,7 @@
  "issingle": 0, 
  "istable": 0, 
  "max_attachments": 0, 
- "modified": "2016-11-05 08:09:08.921026", 
+ "modified": "2016-11-14 16:07:45.817880", 
  "modified_by": "Administrator", 
  "module": "Selling", 
  "name": "Sales Order",