diff --git a/erpnext/__init__.py b/erpnext/__init__.py
index 2d1a24d1c15..b54ba59943c 100644
--- a/erpnext/__init__.py
+++ b/erpnext/__init__.py
@@ -2,7 +2,7 @@
 from __future__ import unicode_literals
 import frappe
 
-__version__ = '7.1.21'
+__version__ = '7.1.22'
 
 def get_default_company(user=None):
 	'''Get default company for user'''
diff --git a/erpnext/accounts/doctype/sales_invoice/pos.py b/erpnext/accounts/doctype/sales_invoice/pos.py
index d6cf12020f6..4e4ad780ed6 100644
--- a/erpnext/accounts/doctype/sales_invoice/pos.py
+++ b/erpnext/accounts/doctype/sales_invoice/pos.py
@@ -296,4 +296,3 @@ def save_invoice(e, si_doc, name):
 		si_doc.docstatus = 0
 		si_doc.flags.ignore_mandatory = True
 		si_doc.insert()
-		frappe.log_error(frappe.get_traceback())
diff --git a/erpnext/projects/doctype/timesheet/timesheet.py b/erpnext/projects/doctype/timesheet/timesheet.py
index 548332091e1..5cb018425a2 100644
--- a/erpnext/projects/doctype/timesheet/timesheet.py
+++ b/erpnext/projects/doctype/timesheet/timesheet.py
@@ -79,9 +79,9 @@ class Timesheet(Document):
 			self.status = "Completed"
 
 	def set_dates(self):
-		if self.docstatus < 2:
-			start_date = min([d.from_time for d in self.time_logs])
-			end_date = max([d.to_time for d in self.time_logs])
+		if self.docstatus < 2 and self.time_logs:
+			start_date = min([getdate(d.from_time) for d in self.time_logs])
+			end_date = max([getdate(d.to_time) for d in self.time_logs])
 
 			if start_date and end_date:
 				self.start_date = getdate(start_date)