diff --git a/baseprocessor.py b/baseprocessor.py
index 185ed41..160719e 100644
--- a/baseprocessor.py
+++ b/baseprocessor.py
@@ -356,6 +356,9 @@ class HDF5Container(BaseProcessor):
                     else:
                         self._save_data(name_full + "/" + key, data[key], "", unit)
         else:
+            if len(data) == 0:
+                return
+
             self.save.create_array(
                 os.path.dirname(name_full),
                 os.path.basename(name_full),