diff --git a/daq/src/aaredaq/daq.py b/daq/src/aaredaq/daq.py
index 1250190b..0e175968 100644
--- a/daq/src/aaredaq/daq.py
+++ b/daq/src/aaredaq/daq.py
@@ -108,7 +108,7 @@ class AareDAQ:
             and getattr(aaredb_params, 'totalrange', None) is None
             and getattr(aaredb_params, 'targetresolution', None) is None
         ):
-            return None
+            return None, file_prefix
 
         params = SimpleScanParameters()