--- a/header.py	Wed May 29 16:36:23 2019 +0300
+++ b/header.py	Thu May 30 12:03:53 2019 +0300
@@ -164,7 +164,7 @@
     def skip_to_next(self, *, spaces_expected = 0):
         while True:
             if self.cursor + 1 >= len(self.model_body):
-                self.parse_error('stub ldraw file')
+                self.parse_error('file does not have a proper header')
             self.cursor += 1
             entry = self.model_body[self.cursor]
             if not is_suitable_header_object(entry):