diff --git a/erpnext/manufacturing/doctype/workstation/workstation.json b/erpnext/manufacturing/doctype/workstation/workstation.json
index 144635c..9f72e5c 100644
--- a/erpnext/manufacturing/doctype/workstation/workstation.json
+++ b/erpnext/manufacturing/doctype/workstation/workstation.json
@@ -3,29 +3,36 @@
  "allow_import": 1, 
  "allow_rename": 1, 
  "autoname": "field:workstation_name", 
+ "beta": 0, 
  "creation": "2013-01-10 16:34:17", 
  "custom": 0, 
  "docstatus": 0, 
  "doctype": "DocType", 
  "document_type": "Setup", 
+ "editable_grid": 0, 
  "fields": [
   {
    "allow_on_submit": 0, 
    "bold": 0, 
    "collapsible": 0, 
+   "columns": 0, 
    "fieldname": "description_and_warehouse", 
    "fieldtype": "Section Break", 
    "hidden": 0, 
    "ignore_user_permissions": 0, 
+   "ignore_xss_filter": 0, 
    "in_filter": 0, 
    "in_list_view": 0, 
+   "in_standard_filter": 0, 
    "label": "", 
    "length": 0, 
    "no_copy": 0, 
    "permlevel": 0, 
    "precision": "", 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
+   "remember_last_selected_value": 0, 
    "report_hide": 0, 
    "reqd": 0, 
    "search_index": 0, 
@@ -36,12 +43,15 @@
    "allow_on_submit": 0, 
    "bold": 0, 
    "collapsible": 0, 
+   "columns": 0, 
    "fieldname": "workstation_name", 
    "fieldtype": "Data", 
    "hidden": 0, 
    "ignore_user_permissions": 0, 
+   "ignore_xss_filter": 0, 
    "in_filter": 0, 
    "in_list_view": 1, 
+   "in_standard_filter": 0, 
    "label": "Workstation Name", 
    "length": 0, 
    "no_copy": 0, 
@@ -49,7 +59,9 @@
    "oldfieldtype": "Data", 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
+   "remember_last_selected_value": 0, 
    "report_hide": 0, 
    "reqd": 1, 
    "search_index": 0, 
@@ -60,12 +72,15 @@
    "allow_on_submit": 0, 
    "bold": 0, 
    "collapsible": 0, 
+   "columns": 0, 
    "fieldname": "description", 
    "fieldtype": "Text", 
    "hidden": 0, 
    "ignore_user_permissions": 0, 
+   "ignore_xss_filter": 0, 
    "in_filter": 0, 
    "in_list_view": 1, 
+   "in_standard_filter": 0, 
    "label": "Description", 
    "length": 0, 
    "no_copy": 0, 
@@ -73,7 +88,9 @@
    "oldfieldtype": "Text", 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
+   "remember_last_selected_value": 0, 
    "report_hide": 0, 
    "reqd": 0, 
    "search_index": 0, 
@@ -85,18 +102,23 @@
    "allow_on_submit": 0, 
    "bold": 0, 
    "collapsible": 0, 
+   "columns": 0, 
    "fieldname": "column_break_4", 
    "fieldtype": "Column Break", 
    "hidden": 0, 
    "ignore_user_permissions": 0, 
+   "ignore_xss_filter": 0, 
    "in_filter": 0, 
    "in_list_view": 0, 
+   "in_standard_filter": 0, 
    "length": 0, 
    "no_copy": 0, 
    "permlevel": 0, 
    "precision": "", 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
+   "remember_last_selected_value": 0, 
    "report_hide": 0, 
    "reqd": 0, 
    "search_index": 0, 
@@ -107,13 +129,16 @@
    "allow_on_submit": 0, 
    "bold": 0, 
    "collapsible": 0, 
+   "columns": 0, 
    "default": "", 
    "fieldname": "holiday_list", 
    "fieldtype": "Link", 
    "hidden": 0, 
    "ignore_user_permissions": 0, 
+   "ignore_xss_filter": 0, 
    "in_filter": 0, 
    "in_list_view": 0, 
+   "in_standard_filter": 0, 
    "label": "Holiday List", 
    "length": 0, 
    "no_copy": 0, 
@@ -121,7 +146,9 @@
    "permlevel": 0, 
    "precision": "", 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
+   "remember_last_selected_value": 0, 
    "report_hide": 0, 
    "reqd": 0, 
    "search_index": 0, 
@@ -132,19 +159,24 @@
    "allow_on_submit": 0, 
    "bold": 0, 
    "collapsible": 0, 
+   "columns": 0, 
    "fieldname": "over_heads", 
    "fieldtype": "Section Break", 
    "hidden": 0, 
    "ignore_user_permissions": 0, 
+   "ignore_xss_filter": 0, 
    "in_filter": 0, 
    "in_list_view": 0, 
+   "in_standard_filter": 0, 
    "label": "Operating Costs", 
    "length": 0, 
    "no_copy": 0, 
    "oldfieldtype": "Section Break", 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
+   "remember_last_selected_value": 0, 
    "report_hide": 0, 
    "reqd": 0, 
    "search_index": 0, 
@@ -155,13 +187,16 @@
    "allow_on_submit": 0, 
    "bold": 0, 
    "collapsible": 0, 
+   "columns": 0, 
    "description": "per hour", 
    "fieldname": "hour_rate_electricity", 
    "fieldtype": "Currency", 
    "hidden": 0, 
    "ignore_user_permissions": 0, 
+   "ignore_xss_filter": 0, 
    "in_filter": 0, 
    "in_list_view": 0, 
+   "in_standard_filter": 0, 
    "label": "Electricity Cost", 
    "length": 0, 
    "no_copy": 0, 
@@ -169,7 +204,9 @@
    "oldfieldtype": "Currency", 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
+   "remember_last_selected_value": 0, 
    "report_hide": 0, 
    "reqd": 0, 
    "search_index": 0, 
@@ -180,13 +217,16 @@
    "allow_on_submit": 0, 
    "bold": 0, 
    "collapsible": 0, 
+   "columns": 0, 
    "description": "per hour", 
    "fieldname": "hour_rate_consumable", 
    "fieldtype": "Currency", 
    "hidden": 0, 
    "ignore_user_permissions": 0, 
+   "ignore_xss_filter": 0, 
    "in_filter": 0, 
    "in_list_view": 0, 
+   "in_standard_filter": 0, 
    "label": "Consumable Cost", 
    "length": 0, 
    "no_copy": 0, 
@@ -194,7 +234,9 @@
    "oldfieldtype": "Currency", 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
+   "remember_last_selected_value": 0, 
    "report_hide": 0, 
    "reqd": 0, 
    "search_index": 0, 
@@ -205,18 +247,23 @@
    "allow_on_submit": 0, 
    "bold": 0, 
    "collapsible": 0, 
+   "columns": 0, 
    "fieldname": "column_break_11", 
    "fieldtype": "Column Break", 
    "hidden": 0, 
    "ignore_user_permissions": 0, 
+   "ignore_xss_filter": 0, 
    "in_filter": 0, 
    "in_list_view": 0, 
+   "in_standard_filter": 0, 
    "length": 0, 
    "no_copy": 0, 
    "permlevel": 0, 
    "precision": "", 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
+   "remember_last_selected_value": 0, 
    "report_hide": 0, 
    "reqd": 0, 
    "search_index": 0, 
@@ -227,13 +274,16 @@
    "allow_on_submit": 0, 
    "bold": 0, 
    "collapsible": 0, 
+   "columns": 0, 
    "description": "per hour", 
    "fieldname": "hour_rate_rent", 
    "fieldtype": "Currency", 
    "hidden": 0, 
    "ignore_user_permissions": 0, 
+   "ignore_xss_filter": 0, 
    "in_filter": 0, 
    "in_list_view": 0, 
+   "in_standard_filter": 0, 
    "label": "Rent Cost", 
    "length": 0, 
    "no_copy": 0, 
@@ -241,7 +291,9 @@
    "oldfieldtype": "Currency", 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
+   "remember_last_selected_value": 0, 
    "report_hide": 0, 
    "reqd": 0, 
    "search_index": 0, 
@@ -252,13 +304,16 @@
    "allow_on_submit": 0, 
    "bold": 0, 
    "collapsible": 0, 
+   "columns": 0, 
    "description": "Wages per hour", 
    "fieldname": "hour_rate_labour", 
    "fieldtype": "Currency", 
    "hidden": 0, 
    "ignore_user_permissions": 0, 
+   "ignore_xss_filter": 0, 
    "in_filter": 0, 
    "in_list_view": 0, 
+   "in_standard_filter": 0, 
    "label": "Wages", 
    "length": 0, 
    "no_copy": 0, 
@@ -266,7 +321,9 @@
    "oldfieldtype": "Currency", 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
+   "remember_last_selected_value": 0, 
    "report_hide": 0, 
    "reqd": 0, 
    "search_index": 0, 
@@ -277,13 +334,16 @@
    "allow_on_submit": 0, 
    "bold": 0, 
    "collapsible": 0, 
+   "columns": 0, 
    "description": "per hour", 
    "fieldname": "hour_rate", 
    "fieldtype": "Currency", 
    "hidden": 0, 
    "ignore_user_permissions": 0, 
+   "ignore_xss_filter": 0, 
    "in_filter": 0, 
    "in_list_view": 0, 
+   "in_standard_filter": 0, 
    "label": "Net Hour Rate", 
    "length": 0, 
    "no_copy": 0, 
@@ -291,7 +351,9 @@
    "oldfieldtype": "Currency", 
    "permlevel": 0, 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 1, 
+   "remember_last_selected_value": 0, 
    "report_hide": 0, 
    "reqd": 0, 
    "search_index": 0, 
@@ -302,19 +364,24 @@
    "allow_on_submit": 0, 
    "bold": 0, 
    "collapsible": 0, 
+   "columns": 0, 
    "fieldname": "working_hours_section", 
    "fieldtype": "Section Break", 
    "hidden": 0, 
    "ignore_user_permissions": 0, 
+   "ignore_xss_filter": 0, 
    "in_filter": 0, 
    "in_list_view": 0, 
+   "in_standard_filter": 0, 
    "label": "Working Hours", 
    "length": 0, 
    "no_copy": 0, 
    "permlevel": 0, 
    "precision": "", 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
+   "remember_last_selected_value": 0, 
    "report_hide": 0, 
    "reqd": 0, 
    "search_index": 0, 
@@ -325,12 +392,15 @@
    "allow_on_submit": 0, 
    "bold": 0, 
    "collapsible": 0, 
+   "columns": 0, 
    "fieldname": "working_hours", 
    "fieldtype": "Table", 
    "hidden": 0, 
    "ignore_user_permissions": 0, 
+   "ignore_xss_filter": 0, 
    "in_filter": 0, 
    "in_list_view": 0, 
+   "in_standard_filter": 0, 
    "label": "Working Hours", 
    "length": 0, 
    "no_copy": 0, 
@@ -338,7 +408,9 @@
    "permlevel": 0, 
    "precision": "", 
    "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
    "read_only": 0, 
+   "remember_last_selected_value": 0, 
    "report_hide": 0, 
    "reqd": 0, 
    "search_index": 0, 
@@ -348,15 +420,16 @@
  ], 
  "hide_heading": 0, 
  "hide_toolbar": 0, 
- "icon": "fa fa-wrench", 
+ "icon": "icon-wrench", 
  "idx": 1, 
+ "image_view": 0, 
  "in_create": 0, 
  "in_dialog": 0, 
  "is_submittable": 0, 
  "issingle": 0, 
  "istable": 0, 
  "max_attachments": 0, 
- "modified": "2015-11-16 06:30:01.041198", 
+ "modified": "2016-12-13 05:04:54.668633", 
  "modified_by": "Administrator", 
  "module": "Manufacturing", 
  "name": "Workstation", 
@@ -372,6 +445,7 @@
    "export": 0, 
    "if_owner": 0, 
    "import": 0, 
+   "is_custom": 0, 
    "permlevel": 0, 
    "print": 1, 
    "read": 1, 
@@ -383,6 +457,9 @@
    "write": 1
   }
  ], 
+ "quick_entry": 0, 
  "read_only": 0, 
- "read_only_onload": 0
+ "read_only_onload": 0, 
+ "sort_order": "ASC", 
+ "track_seen": 0
 }
\ No newline at end of file
diff --git a/erpnext/manufacturing/doctype/workstation/workstation.py b/erpnext/manufacturing/doctype/workstation/workstation.py
index 5095784..dd1c9f2 100644
--- a/erpnext/manufacturing/doctype/workstation/workstation.py
+++ b/erpnext/manufacturing/doctype/workstation/workstation.py
@@ -58,6 +58,9 @@
 def is_within_operating_hours(workstation, operation, from_datetime, to_datetime):
 	operation_length = time_diff_in_seconds(to_datetime, from_datetime)
 	workstation = frappe.get_doc("Workstation", workstation)
+	
+	if not workstation.working_hours:
+		return
 
 	for working_hour in workstation.working_hours:
 		if working_hour.start_time and working_hour.end_time:
diff --git a/erpnext/manufacturing/doctype/workstation_working_hour/workstation_working_hour.json b/erpnext/manufacturing/doctype/workstation_working_hour/workstation_working_hour.json
index b9cd174..89ca714 100644
--- a/erpnext/manufacturing/doctype/workstation_working_hour/workstation_working_hour.json
+++ b/erpnext/manufacturing/doctype/workstation_working_hour/workstation_working_hour.json
@@ -9,11 +9,13 @@
  "doctype": "DocType", 
  "document_type": "", 
  "editable_grid": 1, 
+ "engine": "InnoDB", 
  "fields": [
   {
    "allow_on_submit": 0, 
    "bold": 0, 
    "collapsible": 0, 
+   "columns": 0, 
    "fieldname": "start_time", 
    "fieldtype": "Time", 
    "hidden": 0, 
@@ -21,6 +23,7 @@
    "ignore_xss_filter": 0, 
    "in_filter": 0, 
    "in_list_view": 1, 
+   "in_standard_filter": 0, 
    "label": "Start Time", 
    "length": 0, 
    "no_copy": 0, 
@@ -29,6 +32,7 @@
    "print_hide": 0, 
    "print_hide_if_no_value": 0, 
    "read_only": 0, 
+   "remember_last_selected_value": 0, 
    "report_hide": 0, 
    "reqd": 1, 
    "search_index": 0, 
@@ -39,6 +43,7 @@
    "allow_on_submit": 0, 
    "bold": 0, 
    "collapsible": 0, 
+   "columns": 0, 
    "fieldname": "column_break_2", 
    "fieldtype": "Column Break", 
    "hidden": 0, 
@@ -46,6 +51,7 @@
    "ignore_xss_filter": 0, 
    "in_filter": 0, 
    "in_list_view": 0, 
+   "in_standard_filter": 0, 
    "length": 0, 
    "no_copy": 0, 
    "permlevel": 0, 
@@ -53,6 +59,7 @@
    "print_hide": 0, 
    "print_hide_if_no_value": 0, 
    "read_only": 0, 
+   "remember_last_selected_value": 0, 
    "report_hide": 0, 
    "reqd": 0, 
    "search_index": 0, 
@@ -63,6 +70,7 @@
    "allow_on_submit": 0, 
    "bold": 0, 
    "collapsible": 0, 
+   "columns": 0, 
    "fieldname": "end_time", 
    "fieldtype": "Time", 
    "hidden": 0, 
@@ -70,6 +78,7 @@
    "ignore_xss_filter": 0, 
    "in_filter": 0, 
    "in_list_view": 1, 
+   "in_standard_filter": 0, 
    "label": "End Time", 
    "length": 0, 
    "no_copy": 0, 
@@ -78,6 +87,7 @@
    "print_hide": 0, 
    "print_hide_if_no_value": 0, 
    "read_only": 0, 
+   "remember_last_selected_value": 0, 
    "report_hide": 0, 
    "reqd": 1, 
    "search_index": 0, 
@@ -88,30 +98,7 @@
    "allow_on_submit": 0, 
    "bold": 0, 
    "collapsible": 0, 
-   "fieldname": "section_break_2", 
-   "fieldtype": "Column Break", 
-   "hidden": 0, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_list_view": 0, 
-   "length": 0, 
-   "no_copy": 0, 
-   "permlevel": 0, 
-   "precision": "", 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 0, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "unique": 0
-  }, 
-  {
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
+   "columns": 0, 
    "default": "1", 
    "fieldname": "enabled", 
    "fieldtype": "Check", 
@@ -120,6 +107,7 @@
    "ignore_xss_filter": 0, 
    "in_filter": 0, 
    "in_list_view": 1, 
+   "in_standard_filter": 0, 
    "label": "Enabled", 
    "length": 0, 
    "no_copy": 0, 
@@ -128,6 +116,7 @@
    "print_hide": 0, 
    "print_hide_if_no_value": 0, 
    "read_only": 0, 
+   "remember_last_selected_value": 0, 
    "report_hide": 0, 
    "reqd": 0, 
    "search_index": 0, 
@@ -145,7 +134,7 @@
  "issingle": 0, 
  "istable": 1, 
  "max_attachments": 0, 
- "modified": "2016-07-11 03:28:10.225704", 
+ "modified": "2016-12-13 05:02:36.754145", 
  "modified_by": "Administrator", 
  "module": "Manufacturing", 
  "name": "Workstation Working Hour",