diff --git a/CLDConfig/CLDReconstruction.py b/CLDConfig/CLDReconstruction.py
index 107901b..c96f7f8 100644
--- a/CLDConfig/CLDReconstruction.py
+++ b/CLDConfig/CLDReconstruction.py
@@ -84,6 +84,7 @@
     read.OutputLevel = INFO
     algList.append(read)
 else:
+    print('WARNING: No input files specified, this will fail')
     read = None
 
 MyAIDAProcessor = MarlinProcessorWrapper("MyAIDAProcessor")