issue fixed in patch
diff --git a/erpnext/patches/packing_slip.py b/erpnext/patches/packing_slip.py
index b6c94c0..9285e8a 100644
--- a/erpnext/patches/packing_slip.py
+++ b/erpnext/patches/packing_slip.py
@@ -1,4 +1,5 @@
 def execute():
+	import webnotes
 	from webnotes.modules.module_manager import reload_doc
 	reload_doc('stock', 'doctype', 'delivery_note_detail')
 	reload_doc('stock', 'Print Format', 'Delivery Note Packing List Wise')