Cayenne null pointer error when trying to commit changes

I am running the following code that errors when I try to commit my changes using Cayenne as my ORM. The code is pasted below and errors on the line context.commitChanges (); Output messages are inserted below the code. Any help in identifying this question would be appreciated.

import org.apache.cayenne.access.DataContext;
import java.util. *;

import com.jared. *;
public class Main {

    public static void main (String [] args) {
        DataContext context = DataContext.createDataContext ();
        Stocks theStock = (Stocks) context.createAndRegisterNewObject (Stocks.class);
theStock.setAsk (3.4);
theStock.setAvgdailyvolume (323849);
theStock .setBid (5.29);
theStock.setChange (-1.22);
theStock.setDayhigh (9.21);
theStock.setDaylow (2.11);
theStock.setLasttradeprice (5.11);
theStock.setLasttradesize (3827);
theStock.setOpen (6.21);
theStock.setPriorclose (4.21);
theStock.setShortratio (1.1);
theStock.setSymbol ("^ SP%");
theStock.setVolume (28193);
theStock.setLasttradedate (new Date ());
    context.commitChanges ();
    System.out.println ("Done with the database");
    }
}
Nov 20, 2008 11:20:37 PM org.apache.cayenne.conf.RuntimeLoadDelegate startedLoading
INFO: started configuration loading.
Nov 20, 2008 11:20:37 PM org.apache.cayenne.conf.RuntimeLoadDelegate shouldLoadDataDomain
INFO: loaded domain: stocks
Nov 20, 2008 11:20:37 PM org.apache.cayenne.conf.RuntimeLoadDelegate loadDataMap
INFO: loaded.
Nov 20, 2008 11:20:37 PM org.apache.cayenne.conf.RuntimeLoadDelegate shouldLoadDataNode
INFO: loading.
Nov 20, 2008 11:20:37 PM org.apache.cayenne.conf.RuntimeLoadDelegate shouldLoadDataNode
INFO: using factory: org.apache.cayenne.conf.DriverDataSourceFactory
Nov 20, 2008 11:20:37 PM org.apache.cayenne.conf.DriverDataSourceFactory load
INFO: loading driver information from 'stocksNode.driver.xml'.
Nov 20, 2008 11:20:37 PM org.apache.cayenne.conf.DriverDataSourceFactory $ DriverHandler init
INFO: loading driver org.hsqldb.jdbcDriver
Nov 20, 2008 11:20:37 PM org.apache.cayenne.conf.DriverDataSourceFactory $ LoginHandler init
INFO: loading user name and password.
Nov 20, 2008 11:20:37 PM org.apache.cayenne.access.QueryLogger logPoolCreated
INFO: Created connection pool: jdbc: hsqldb: file: / hsqldb / data / stocks
    Driver class: org.hsqldb.jdbcDriver
    Min. connections in the pool: 1
    Max. connections in the pool: 1
Nov 20, 2008 11:20:37 PM org.apache.cayenne.conf.RuntimeLoadDelegate shouldLoadDataNode
INFO: loaded datasource.
Nov 20, 2008 11:20:37 PM org.apache.cayenne.conf.RuntimeLoadDelegate initAdapter
INFO: no adapter set, using automatic adapter.
Nov 20, 2008 11:20:37 PM org.apache.cayenne.conf.RuntimeLoadDelegate finishedLoading
INFO: finished configuration loading in 203 ms.
Exception in thread "main" org.apache.cayenne.CayenneRuntimeException: [v.3.0M4 May 18 2008 16:32:02] Commit Exception
    at org.apache.cayenne.access.DataContext.flushToParent (DataContext.java:1192)
    at org.apache.cayenne.access.DataContext.commitChanges (DataContext.java:1066)
    at Main.main (Main.java:24)
Caused by: java.lang.NullPointerException
    at org.apache.cayenne.access.DataDomainInsertBucket.createPermIds (DataDomainInsertBucket.java:101)
    at org.apache.cayenne.access.DataDomainInsertBucket.appendQueriesInternal (DataDomainInsertBucket.java:76)
    at org.apache.cayenne.access.DataDomainSyncBucket.appendQueries (DataDomainSyncBucket.java:80)
    at org.apache.cayenne.access.DataDomainFlushAction.preprocess (DataDomainFlushAction.java:183)
    at org.apache.cayenne.access.DataDomainFlushAction.flush (DataDomainFlushAction.java:135)
    at org.apache.cayenne.access.DataDomain.onSyncFlush (DataDomain.java:821)
    at org.apache.cayenne.access.DataDomain $ 2.transform (DataDomain.java:788)
    at org.apache.cayenne.access.DataDomain.runInTransaction (DataDomain.java:847)
    at org.apache.cayenne.access.DataDomain.onSync (DataDomain.java:785)
    at org.apache.cayenne.access.DataContext.flushToParent (DataContext.java:1164)
    ... 2 more
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Username: Password?



ClientConnection = new HessianConnection (" http: // localhost: 8080 / cayenne-service ", "cayenne-user", "secret",
null);

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