enhancing with maven plugin

[sudhakar <su...@co.brazos.tx.us>]

I'm following the instructions here
http://mojo.codehaus.org/openjpa-maven-plugin/usage.html

In my eclipse maven project I first run the package goal. Then in a
command prompt I run mvn -e openjpa:enhance and I get the following
stacktrace:

[INFO] [openjpa:enhance]
[INFO]
[INFO]
------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO]
------------------------------------------------------------------------
[INFO] The OpenJPA Enhancer tool exited with a non-null exit code.
[INFO]
------------------------------------------------------------------------
[INFO] Trace
org.apache.maven.lifecycle.LifecycleExecutionException: The OpenJPA
Enhancer too
l exited with a non-null exit code.
        at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(Defa
ultLifecycleExecutor.java:564)
        at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandalone
Goal(DefaultLifecycleExecutor.java:493)
        at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(Defau
ltLifecycleExecutor.java:463)
        at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHan
dleFailures(DefaultLifecycleExecutor.java:311)
        at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegmen
ts(DefaultLifecycleExecutor.java:278)
        at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLi
fecycleExecutor.java:143)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:334)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:125)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:272)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at
org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
        at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
        at
org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)

        at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: org.apache.maven.plugin.MojoExecutionException: The OpenJPA
Enhancer
tool exited with a non-null exit code.
        at
org.codehaus.mojo.openjpa.OpenJpaEnhancerMojo.enhance(OpenJpaEnhancer
Mojo.java:248)
        at
org.codehaus.mojo.openjpa.OpenJpaEnhancerMojo.execute(OpenJpaEnhancer
Mojo.java:105)
        at
org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPlugi
nManager.java:443)
        at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(Defa
ultLifecycleExecutor.java:539)
        ... 16 more
[INFO]
------------------------------------------------------------------------
[INFO] Total time: 5 seconds
[INFO] Finished at: Sun Aug 19 16:33:18 CDT 2007
[INFO] Final Memory: 5M/10M
[INFO]
------------------------------------------------------------------------

Don't know what I'm missing.

Thanks for any help.
-sud