Index: /trunk/autoquest-plugin-html/src/main/java/de/ugoe/cs/autoquest/plugin/html/eventcore/HTMLEventTypeFactory.java
===================================================================
--- /trunk/autoquest-plugin-html/src/main/java/de/ugoe/cs/autoquest/plugin/html/eventcore/HTMLEventTypeFactory.java	(revision 1238)
+++ /trunk/autoquest-plugin-html/src/main/java/de/ugoe/cs/autoquest/plugin/html/eventcore/HTMLEventTypeFactory.java	(revision 1239)
@@ -141,12 +141,12 @@
         String xCoord = eventParameters.get(xParamName);
         if (xCoord == null) {
-            throw new IllegalArgumentException
-                ("eventParameters do not contain " + xParamName + " coordinate.");
+            Console.printerrln("eventParameters do not contain " + xParamName + " coordinate.");
+            xCoord = "0";
         }
 
         String yCoord = eventParameters.get(yParamName);
         if (yCoord == null) {
-            throw new IllegalArgumentException
-                ("eventParameters do not contain " + yParamName + " coordinate.");
+            Console.printerrln("eventParameters do not contain " + yParamName + " coordinate.");
+            yCoord = "0";
         }