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-rw-r--r--wqflask/base/data_set.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/wqflask/base/data_set.py b/wqflask/base/data_set.py
index 1042e1bd..0ea61faa 100644
--- a/wqflask/base/data_set.py
+++ b/wqflask/base/data_set.py
@@ -403,7 +403,7 @@ class DatasetGroup:
         try:
             f = open(study_sample_file)
         except:
-            return None
+            return []
         study_samples = json.load(f)
         return study_samples