Index: sodar/trunk/sodar/utils/findMissing.py
===================================================================
--- sodar/trunk/sodar/utils/findMissing.py (revision 152)
+++ sodar/trunk/sodar/utils/findMissing.py (revision 163)
@@ -81,8 +81,11 @@
                  for fileName in files]
     
-    differenceWalk = [path
-                      for path
-                      in idealWalk
-                      if path not in destinationWalk]
+    if destinationWalk:
+        differenceWalk = [path
+                          for path
+                          in idealWalk
+                          if path not in destinationWalk]
+    else:
+        differenceWalk = idealWalk
     
     differenceWalk = sorted(differenceWalk)