diff --git a/erpnext/manufacturing/doctype/production_plan/production_plan.py b/erpnext/manufacturing/doctype/production_plan/production_plan.py
index 261aa76b70..131f438e20 100644
--- a/erpnext/manufacturing/doctype/production_plan/production_plan.py
+++ b/erpnext/manufacturing/doctype/production_plan/production_plan.py
@@ -347,7 +347,7 @@ class ProductionPlan(Document):
 			if not data.pending_qty:
 				continue
 
-			item_details = get_item_details(data.item_code)
+			item_details = get_item_details(data.item_code, throw=False)
 			if self.combine_items:
 				if item_details.bom_no in refs:
 					refs[item_details.bom_no]["so_details"].append(
@@ -795,6 +795,9 @@ class ProductionPlan(Document):
 			if not row.item_code:
 				frappe.throw(_("Row #{0}: Please select Item Code in Assembly Items").format(row.idx))
 
+			if not row.bom_no:
+				frappe.throw(_("Row #{0}: Please select the BOM No in Assembly Items").format(row.idx))
+
 			bom_data = []
 
 			warehouse = row.warehouse if self.skip_available_sub_assembly_item else None
diff --git a/erpnext/manufacturing/doctype/work_order/work_order.py b/erpnext/manufacturing/doctype/work_order/work_order.py
index 7c15bf9234..5ad79f94b7 100644
--- a/erpnext/manufacturing/doctype/work_order/work_order.py
+++ b/erpnext/manufacturing/doctype/work_order/work_order.py
@@ -1082,7 +1082,7 @@ def get_bom_operations(doctype, txt, searchfield, start, page_len, filters):
 
 
 @frappe.whitelist()
-def get_item_details(item, project=None, skip_bom_info=False):
+def get_item_details(item, project=None, skip_bom_info=False, throw=True):
 	res = frappe.db.sql(
 		"""
 		select stock_uom, description, item_name, allow_alternative_item,
@@ -1118,12 +1118,15 @@ def get_item_details(item, project=None, skip_bom_info=False):
 
 	if not res["bom_no"]:
 		if project:
-			res = get_item_details(item)
+			res = get_item_details(item, throw=throw)
 			frappe.msgprint(
 				_("Default BOM not found for Item {0} and Project {1}").format(item, project), alert=1
 			)
 		else:
-			frappe.throw(_("Default BOM for {0} not found").format(item))
+			msg = _("Default BOM for {0} not found").format(item)
+			frappe.msgprint(msg, raise_exception=throw, indicator="yellow", alert=(not throw))
+
+			return res
 
 	bom_data = frappe.db.get_value(
 		"BOM",