See Thread at: http://www.techienuggets.com/Detail?tx=19476 Posted on behalf of a User Hi, Did u solve the above issue. I am getting the same issue now.... - Mouli In Response To: Hi, I am using Seam with RichFaces. I am currently running into an issue where Seam tries to serialise the richfaces SelectionRange object (held on the SimpleSelection object). Is there anyway in Seam to mark something as transient data so that it does not get serialised on the conversation ? I have tries using; private transient SimpleSelection selection; But still get the following exception; java.io.NotSerializableException: org.richfaces.model.selection.SelectionRange at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1081) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:302) at java.util.ArrayList.writeObject(ArrayList.java:569) Any help on this would be appreciated, Thanks, Brian