diff --git a/inventree_phomemo/phomemo_label.py b/inventree_phomemo/phomemo_label.py
index 73133fe..8176aab 100644
--- a/inventree_phomemo/phomemo_label.py
+++ b/inventree_phomemo/phomemo_label.py
@@ -65,9 +65,9 @@ class PhomemoLabelPlugin(LabelPrintingMixin, SettingsMixin, InvenTreePlugin):
             'name': tpart.name,
             'description': tpart.description,
             'pk': tpart.pk,
-            'params': tpart.parameters_map(),
-            'category': tpart.category.name,
-            'category_path': tpart.category.pathstring,
+            'params': tpart.parameters_map() if hasattr(tpart, 'parameters_map') else None,
+            'category': tpart.category.name if hasattr(tpart, 'category') else None,
+            'category_path': tpart.category.pathstring if hasattr(tpart, 'category') else None,
             'barcode': barcode,
             'type': kwargs['label_instance'].SUBDIR
         }