Index: trunk/EventBenchConsole/src/de/ugoe/cs/eventbench/EventGenerator.java
===================================================================
--- trunk/EventBenchConsole/src/de/ugoe/cs/eventbench/EventGenerator.java	(revision 27)
+++ trunk/EventBenchConsole/src/de/ugoe/cs/eventbench/EventGenerator.java	(revision 28)
@@ -549,4 +549,7 @@
 					String target = varMessage.getXmlWindowDescription();
 					int index = target.lastIndexOf("<");
+					if( index==0 ) {
+						Console.println("Trying to adress parent of top-level window! Replay probably invalid!");
+					}
 					value = target.substring(0, index);
 				}