I want to use "org.apache.openjpa.enhance.PCEnhancer" class to enhance my
java files.
How can i do it? 
I tried it by ANT like:
 <target name="Compile"> 
   
   <taskdef name="openjpac"
classname="org.apache.openjpa.ant.PCEnhancerTask"/> 
      <openjpac>
         <fileset dir="."> <include name="Main.java" /> </fileset>
         <config propertiesFile="META-INF/persistence.xml"/>
    </openjpac> 
   </target> 
But i am getting one Exception:
Exception in thread "main" <openjpa-1.2.1-r752877:753278 fatal user error>
org.apache.openjpa.util.MetaDataException: MetaDataFactory could not be
configured (conf.newMetaDataFactoryInstance() returned null). This might
mean that no configuration properties were found. Ensure that you have a
META-INF/persistence.xml file, that it is available in your classpath, or
that the properties file you are using for configuration is available. If
you are using Ant, please see the <properties> or <propertiesFile>
attributes of the task's nested <config> element. This can also occur if
your OpenJPA distribution jars are corrupt, or if your security policy is
overly strict.

Please help
Thanks
Dhirendra Rawal
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