po date should be greated than equal to pur request date
diff --git a/erpnext/buying/DocType Mapper/Purchase Request-Purchase Order/Purchase Request-Purchase Order.txt b/erpnext/buying/DocType Mapper/Purchase Request-Purchase Order/Purchase Request-Purchase Order.txt
index befcb8c..e4fdd93 100644
--- a/erpnext/buying/DocType Mapper/Purchase Request-Purchase Order/Purchase Request-Purchase Order.txt
+++ b/erpnext/buying/DocType Mapper/Purchase Request-Purchase Order/Purchase Request-Purchase Order.txt
@@ -5,7 +5,7 @@
 	{
 		'creation': '2010-08-08 17:09:34',
 		'docstatus': 0,
-		'modified': '2012-04-03 12:49:50',
+		'modified': '2012-07-02 11:12:28',
 		'modified_by': u'Administrator',
 		'owner': u'Administrator'
 	},
@@ -22,7 +22,6 @@
 	# These values are common for all Field Mapper Detail
 	{
 		'doctype': u'Field Mapper Detail',
-		'map': u'Yes',
 		'name': '__common__',
 		'parent': u'Purchase Request-Purchase Order',
 		'parentfield': u'field_mapper_details',
@@ -50,6 +49,7 @@
 		'checking_operator': u'=',
 		'doctype': u'Field Mapper Detail',
 		'from_field': u'company',
+		'map': u'Yes',
 		'match_id': 0,
 		'to_field': u'company'
 	},
@@ -58,6 +58,7 @@
 	{
 		'doctype': u'Field Mapper Detail',
 		'from_field': u'parenttype',
+		'map': u'Yes',
 		'match_id': 1,
 		'to_field': u'prevdoc_doctype'
 	},
@@ -66,6 +67,7 @@
 	{
 		'doctype': u'Field Mapper Detail',
 		'from_field': u'parent',
+		'map': u'Yes',
 		'match_id': 1,
 		'to_field': u'prevdoc_docname'
 	},
@@ -74,6 +76,7 @@
 	{
 		'doctype': u'Field Mapper Detail',
 		'from_field': u'name',
+		'map': u'Yes',
 		'match_id': 1,
 		'to_field': u'prevdoc_detail_docname'
 	},
@@ -82,6 +85,7 @@
 	{
 		'doctype': u'Field Mapper Detail',
 		'from_field': u'uom',
+		'map': u'Yes',
 		'match_id': 1,
 		'to_field': u'stock_uom'
 	},
@@ -90,6 +94,7 @@
 	{
 		'doctype': u'Field Mapper Detail',
 		'from_field': u'eval:flt(1)',
+		'map': u'Yes',
 		'match_id': 1,
 		'to_field': u'conversion_factor'
 	},
@@ -98,6 +103,7 @@
 	{
 		'doctype': u'Field Mapper Detail',
 		'from_field': u'eval:flt(obj.qty) - flt(obj.ordered_qty)',
+		'map': u'Yes',
 		'match_id': 1,
 		'to_field': u'stock_qty'
 	},
@@ -106,6 +112,7 @@
 	{
 		'doctype': u'Field Mapper Detail',
 		'from_field': u'eval:flt(obj.qty) - flt(obj.ordered_qty)',
+		'map': u'Yes',
 		'match_id': 1,
 		'to_field': u'qty'
 	},
@@ -114,10 +121,21 @@
 	{
 		'doctype': u'Field Mapper Detail',
 		'from_field': u'schedule_date',
+		'map': u'Yes',
 		'match_id': 1,
 		'to_field': u'schedule_date'
 	},
 
+	# Field Mapper Detail
+	{
+		'checking_operator': u'>=',
+		'doctype': u'Field Mapper Detail',
+		'from_field': u'transaction_date',
+		'map': u'No',
+		'match_id': 0,
+		'to_field': u'transaction_date'
+	},
+
 	# Table Mapper Detail
 	{
 		'doctype': u'Table Mapper Detail',