diff --git a/sanofi/dist/etc/sanofi-dropbox/dropbox-all-in-one-with-library.py b/sanofi/dist/etc/sanofi-dropbox/dropbox-all-in-one-with-library.py
index d6f3af0c86a8172b39569c80fdf35b0682ff990e..d4d77f278cd9155a30443f1289f1ea8659626726 100644
--- a/sanofi/dist/etc/sanofi-dropbox/dropbox-all-in-one-with-library.py
+++ b/sanofi/dist/etc/sanofi-dropbox/dropbox-all-in-one-with-library.py
@@ -323,6 +323,10 @@ global plateCode
 global plate 
     
 if incoming.isDirectory():
+    experiment = None
+    plateCode = None
+    plate = None
+    
     transaction = service.transaction(incoming, factory)
     
     (batchName, plateCode) = parseIncomingDirname(incoming.getName())