diff --git a/source/java/org/alfresco/filesys/repo/CommandExecutorImpl.java b/source/java/org/alfresco/filesys/repo/CommandExecutorImpl.java
index dbfa6db3d7..f647ba1b98 100644
--- a/source/java/org/alfresco/filesys/repo/CommandExecutorImpl.java
+++ b/source/java/org/alfresco/filesys/repo/CommandExecutorImpl.java
@@ -172,7 +172,7 @@ public class CommandExecutorImpl implements CommandExecutor
         }
         else
         {
-            throw new IllegalArgumentException();
+            return null;
         }
     }