diff --git a/erpnext/demo/user/purchase.py b/erpnext/demo/user/purchase.py
index 69dee00..781c304 100644
--- a/erpnext/demo/user/purchase.py
+++ b/erpnext/demo/user/purchase.py
@@ -162,7 +162,7 @@
 		"item_code": items.get("item_code"),
 		"rm_item_code": supplied_items.get("rm_item_code"),
 		"item_name": supplied_items.get("rm_item_code"),
-		"qty": supplied_items.get("required_qty"),
+		"qty": supplied_items.get("required_qty") + random.randint(3,10),
 		"amount": supplied_items.get("amount"),
 		"warehouse": supplied_items.get("reserve_warehouse"),
 		"rate": supplied_items.get("rate"),
diff --git a/erpnext/demo/user/sales.py b/erpnext/demo/user/sales.py
index 304576a..fbeeff4 100644
--- a/erpnext/demo/user/sales.py
+++ b/erpnext/demo/user/sales.py
@@ -34,21 +34,24 @@
 				opportunity.declare_enquiry_lost('Did not ask')
 
 	for i in range(random.randint(1,3)):
-		if random.random() < 0.3:
+		if random.random() < 0.6:
 			make_sales_order()
 
 	if random.random() < 0.5:
 		#make payment request against Sales Order
 		sales_order_name = get_random("Sales Order", filters={"docstatus": 1})
-		if sales_order_name:
-			so = frappe.get_doc("Sales Order", sales_order_name)
-			if flt(so.per_billed) != 100:
-				payment_request = make_payment_request(dt="Sales Order", dn=so.name, recipient_id=so.contact_email,
-					submit_doc=True, mute_email=True, use_dummy_message=True)
+		try:
+			if sales_order_name:
+				so = frappe.get_doc("Sales Order", sales_order_name)
+				if flt(so.per_billed) != 100:
+					payment_request = make_payment_request(dt="Sales Order", dn=so.name, recipient_id=so.contact_email,
+						submit_doc=True, mute_email=True, use_dummy_message=True)
 
-				payment_entry = frappe.get_doc(make_payment_entry(payment_request.name))
-				payment_entry.posting_date = frappe.flags.current_date
-				payment_entry.submit()
+					payment_entry = frappe.get_doc(make_payment_entry(payment_request.name))
+					payment_entry.posting_date = frappe.flags.current_date
+					payment_entry.submit()
+		except Exception:
+			pass
 
 def make_opportunity():
 	b = frappe.get_doc({
diff --git a/erpnext/demo/user/stock.py b/erpnext/demo/user/stock.py
index 50257dc..6036a26 100644
--- a/erpnext/demo/user/stock.py
+++ b/erpnext/demo/user/stock.py
@@ -56,8 +56,9 @@
 				if not d.expense_account:
 					d.expense_account = ("Cost of Goods Sold - {0}".format(
 						frappe.get_cached_value('Company',  dn.company,  'abbr')))
-			dn.insert()
+
 			try:
+				dn.insert()
 				dn.submit()
 				frappe.db.commit()
 			except (NegativeStockError, SerialNoRequiredError, SerialNoQtyError, UnableToSelectBatchError):