Hi,

1. In this example IS the exception being thrown if ANY of the Table elements are being changed by another client OR only if the element that we changed has been changed by another client?

2. Just to verify - the exception is thrown from the commit() isn't it?

   PersistenceManager pm = PMF.get().getPersistenceManager();    
   try {
       pm.currentTransaction().begin();
       List<Row> Table = (List<Row>) pm.newQuery(query).execute();
       Table.get(0).setReserved(true);    // <----- we change only this element
       pm.currentTransaction().commit();
   } catch (JDOCanRetryException ex) {
       pm.currentTransaction().rollback() // <----- if Table.get(1) was changed by another client do we get to this point??? 
   }