Index: trunk/quest-plugin-mfc/src/main/java/de/ugoe/cs/quest/plugin/mfc/MFCLogParser.java
===================================================================
--- trunk/quest-plugin-mfc/src/main/java/de/ugoe/cs/quest/plugin/mfc/MFCLogParser.java	(revision 837)
+++ trunk/quest-plugin-mfc/src/main/java/de/ugoe/cs/quest/plugin/mfc/MFCLogParser.java	(revision 844)
@@ -199,5 +199,5 @@
                 Console.printerrln("Failure parsing file in line " + e.getLineNumber() +
                                    ", column " + e.getColumnNumber() + ".");
-                e.printStackTrace();
+                Console.logException(e);
             }
             catch (SAXException e) {
@@ -237,5 +237,9 @@
      */
     public GUIModel getGuiModel() {
-        return currentWindowTree.getGUIModel();
+        if( currentWindowTree!=null ) {
+            return currentWindowTree.getGUIModel();
+        } else {
+            return null;
+        }
     }