diff --git a/common/source/java/ch/systemsx/cisd/common/exceptions/UndefinedGroupException.java b/common/source/java/ch/systemsx/cisd/common/exceptions/UndefinedGroupException.java
deleted file mode 100644
index f144eccfa04d749350413d0bbfbb731773cd5571..0000000000000000000000000000000000000000
--- a/common/source/java/ch/systemsx/cisd/common/exceptions/UndefinedGroupException.java
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
- * Copyright 2007 ETH Zuerich, CISD
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package ch.systemsx.cisd.common.exceptions;
-
-/**
- * This <code>UserFailureException</code> extension signals that a session has expired.
- * 
- * @author Christian Ribeaud
- */
-public final class UndefinedGroupException extends UserFailureException
-{
-    private static final long serialVersionUID = 1L;
-
-    private final static String MESSAGE = "Group not specified, home group unknown";
-
-    public UndefinedGroupException()
-    {
-        super(MESSAGE);
-    }
-
-}