diff --git a/erpnext/manufacturing/doctype/bom/bom.js b/erpnext/manufacturing/doctype/bom/bom.js
index 1c4b7a1..15affd8 100644
--- a/erpnext/manufacturing/doctype/bom/bom.js
+++ b/erpnext/manufacturing/doctype/bom/bom.js
@@ -411,7 +411,7 @@
 
 cur_frm.cscript.time_in_mins = cur_frm.cscript.hour_rate;
 
-cur_frm.cscript.bom_no	= function(doc, cdt, cdn) {
+cur_frm.cscript.bom_no = function(doc, cdt, cdn) {
 	get_bom_material_detail(doc, cdt, cdn, false);
 };
 
@@ -419,17 +419,22 @@
 	if (doc.is_default) cur_frm.set_value("is_active", 1);
 };
 
-var get_bom_material_detail= function(doc, cdt, cdn, scrap_items) {
+var get_bom_material_detail = function(doc, cdt, cdn, scrap_items) {
+	if (!doc.company) {
+		frappe.throw({message: __("Please select a Company first."), title: __("Mandatory")});
+	}
+
 	var d = locals[cdt][cdn];
 	if (d.item_code) {
 		return frappe.call({
 			doc: doc,
 			method: "get_bom_material_detail",
 			args: {
-				'item_code': d.item_code,
-				'bom_no': d.bom_no != null ? d.bom_no: '',
+				"company": doc.company,
+				"item_code": d.item_code,
+				"bom_no": d.bom_no != null ? d.bom_no: '',
 				"scrap_items": scrap_items,
-				'qty': d.qty,
+				"qty": d.qty,
 				"stock_qty": d.stock_qty,
 				"include_item_in_manufacturing": d.include_item_in_manufacturing,
 				"uom": d.uom,
@@ -468,7 +473,7 @@
 	}
 
 	if (d.bom_no) {
-		frappe.msgprint(__("You can not change rate if BOM mentioned agianst any item"));
+		frappe.msgprint(__("You cannot change the rate if BOM is mentioned against any Item."));
 		get_bom_material_detail(doc, cdt, cdn, scrap_items);
 	} else {
 		erpnext.bom.calculate_rm_cost(doc);
diff --git a/erpnext/manufacturing/doctype/bom/bom.py b/erpnext/manufacturing/doctype/bom/bom.py
index 6363242..03beedb 100644
--- a/erpnext/manufacturing/doctype/bom/bom.py
+++ b/erpnext/manufacturing/doctype/bom/bom.py
@@ -65,6 +65,10 @@
 
 	def validate(self):
 		self.route = frappe.scrub(self.name).replace('_', '-')
+
+		if not self.company:
+			frappe.throw(_("Please select a Company first."), title=_("Mandatory"))
+
 		self.clear_operations()
 		self.validate_main_item()
 		self.validate_currency()
@@ -125,6 +129,7 @@
 			self.validate_bom_currecny(item)
 
 			ret = self.get_bom_material_detail({
+				"company": self.company,
 				"item_code": item.item_code,
 				"item_name": item.item_name,
 				"bom_no": item.bom_no,
@@ -213,6 +218,7 @@
 
 		for d in self.get("items"):
 			rate = self.get_rm_rate({
+				"company": self.company,
 				"item_code": d.item_code,
 				"bom_no": d.bom_no,
 				"qty": d.qty,
@@ -611,10 +617,20 @@
 	""" Get weighted average of valuation rate from all warehouses """
 
 	total_qty, total_value, valuation_rate = 0.0, 0.0, 0.0
-	for d in frappe.db.sql("""select actual_qty, stock_value from `tabBin`
-		where item_code=%s""", args['item_code'], as_dict=1):
-			total_qty += flt(d.actual_qty)
-			total_value += flt(d.stock_value)
+	item_bins = frappe.db.sql("""
+		select
+			bin.actual_qty, bin.stock_value
+		from
+			`tabBin` bin, `tabWarehouse` warehouse
+		where
+			bin.item_code=%(item)s
+			and bin.warehouse = warehouse.name
+			and warehouse.company=%(company)s""",
+		{"item": args['item_code'], "company": args['company']}, as_dict=1)
+
+	for d in item_bins:
+		total_qty += flt(d.actual_qty)
+		total_value += flt(d.stock_value)
 
 	if total_qty:
 		valuation_rate =  total_value / total_qty
diff --git a/erpnext/manufacturing/doctype/work_order/work_order.py b/erpnext/manufacturing/doctype/work_order/work_order.py
index cc93bf9..8e7fac8 100644
--- a/erpnext/manufacturing/doctype/work_order/work_order.py
+++ b/erpnext/manufacturing/doctype/work_order/work_order.py
@@ -725,6 +725,7 @@
 		args.update(item_data)
 
 		args["rate"] = get_bom_item_rate({
+			"company": wo_doc.company,
 			"item_code": args.get("item_code"),
 			"qty": args.get("required_qty"),
 			"uom": args.get("stock_uom"),