diff --git a/python/musicexp.py b/python/musicexp.py
index 1c061da..99649b2 100644
--- a/python/musicexp.py
+++ b/python/musicexp.py
@@ -2130,7 +2130,8 @@ class StaffGroup:
             self.part_information = staves_info
         else:
             for c in self.children:
-                c.set_part_information (part_name, staves_info)
+                if hasattr(c, 'set_part_information'):
+                    c.set_part_information (part_name, staves_info)
 
     def add_context_modification (self, modification):
         self.context_modifications.append (modification)