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I'm sure this post is useless for you, but I figured I should correct this anyway for others' reference. To be serializable, you should implement these 2 methods: private void writeObject(java.io.ObjectOutputStream out) throws IOException private void readObject(java.io.ObjectInputStream in) throws IOException, ClassNotFoundException; It is explained in the JavaDoc for j2se: http://java.sun.com/j2se/1.4.2/docs/api/java/io/Serializable.html http://java.sun.com/j2se/1.4.2/docs/api/java/io/Serializable.html With what you had, my guess was that rubricList would just be null after deserialization, not the exception you got, but this is what you should do anyway. Here is the class with those methods implemented: import java.io.*; public class RubricSelectionModel implements Serializable{ private static final long serialVersionUID = 1L; private List rubricList; public RubricSelectionModel(List itemList) { this.rubricList = itemList; } public int getOptionCount() { return rubricList.size(); } public Object getOption(int index) { return rubricList.get(index); } public String getLabel(int index) { return ((Rubric) rubricList.get(index)).getName(); } public String getValue(int index) { return ((Rubric) rubricList.get(index)).getId().toString(); } public Object translateValue(String value) { Iterator e = rubricList.iterator(); while(e.hasNext()){ Rubric rubric = (Rubric)e.next(); if(rubric.getId().toString() == value){ return rubric; } } return null; } private void writeObject(java.io.ObjectOutputStream out) throws IOException { out.writeObject( rubricList ); } private void readObject(java.io.ObjectInputStream in) throws IOException, ClassNotFoundException { rubricList = (List)in.readObject(); } } -- View this message in context: http://www.nabble.com/%22Could-not-find-a-strategy-instance-for-class-RubricSelectionModel%22-when-working-with-PropertySelection-component-tf2046393.html#a10025753 Sent from the Tapestry - User mailing list archive at Nabble.com.