diff --git a/detectron2/data/datasets/voc_style_coco.py b/detectron2/data/datasets/voc_style_coco.py
index b899f88..cbce1d9 100644
--- a/detectron2/data/datasets/voc_style_coco.py
+++ b/detectron2/data/datasets/voc_style_coco.py
@@ -95,6 +95,8 @@ def load_voc_coco_instances(dirname: str, split: str, class_names: Union[List[st
             # else:
             #     cls = cls_name
             print(len(fileid))
+            print(type(fileid))
+
             if len(fileid) > 10:
                 cls = "unknown"
             else: