fix in send notification part of recurring invoices
diff --git a/erpnext/accounts/doctype/gl_control/gl_control.py b/erpnext/accounts/doctype/gl_control/gl_control.py
index cc7a23b..001df84 100644
--- a/erpnext/accounts/doctype/gl_control/gl_control.py
+++ b/erpnext/accounts/doctype/gl_control/gl_control.py
@@ -589,5 +589,5 @@
 
 	msg = hd + tbl + totals
 	from webnotes.utils.email_lib import sendmail
-	sendmail(recipients = [new_rv.doc.email_notification_address], \
+	sendmail(recipients = new_rv.doc.notification_email_address.split(", "), \
 		sender=new_rv.doc.owner, subject=subject, parts=[['text/plain', msg]])
diff --git a/erpnext/accounts/doctype/receivable_voucher/receivable_voucher.js b/erpnext/accounts/doctype/receivable_voucher/receivable_voucher.js
index edff465..ed47257 100644
--- a/erpnext/accounts/doctype/receivable_voucher/receivable_voucher.js
+++ b/erpnext/accounts/doctype/receivable_voucher/receivable_voucher.js
@@ -439,7 +439,7 @@
 cur_frm.cscript.convert_into_recurring_invoice = function(doc) {
 	if (doc.convert_into_recurring_invoice) {
 		doc.repeat_on_day_of_month = doc.posting_date.split('-')[2];
-		doc.notification_email_address = doc.owner + ', ' + doc.contact_email;
+		doc.notification_email_address = [doc.owner, doc.contact_email].join(', ');
 		refresh_field(['repeat_on_day_of_month', 'notification_email_address']);
 	}		
 }