datetime issue fixed in maintenance schedule
diff --git a/erpnext/support/doctype/maintenance_schedule/maintenance_schedule.py b/erpnext/support/doctype/maintenance_schedule/maintenance_schedule.py
index 2398950..0ecc9c0 100644
--- a/erpnext/support/doctype/maintenance_schedule/maintenance_schedule.py
+++ b/erpnext/support/doctype/maintenance_schedule/maintenance_schedule.py
@@ -4,7 +4,7 @@
from __future__ import unicode_literals
import frappe
-from frappe.utils import add_days, getdate, cint
+from frappe.utils import add_days, getdate, cint, cstr
from frappe import throw, _
from erpnext.utilities.transaction_base import TransactionBase, delete_events
@@ -73,7 +73,7 @@
"owner": email_map[d.sales_person] or self.owner,
"subject": description,
"description": description,
- "starts_on": key["scheduled_date"] + " 10:00:00",
+ "starts_on": cstr(key["scheduled_date"]) + " 10:00:00",
"event_type": "Private",
"ref_type": self.doctype,
"ref_name": self.name