Failed to start transcaction when converting backends into modules

Question

I am trying to convert Google Web Application to EAR application (backends into modules).I have created EAR Project and dynamic Web projects for modules. I have added old front-end code to the default module & back-ends code to the other modules. Facing problem while adding data to the datastore .The old Project which uses front end back-ends working properly,Problem comes when converting backends into module & tx.begin() throws Exception .I have created package.jdo for jdo configuration.

Software configuration:- Eclipse-Juno,Google App Engine SDK:- 1.8.5,JDK:- 1.7.0_65,JDO:-JDO 2.3,DataNucleus Eclipse Plugins :-4.0.0.

PersistenceManager pm  = null;
pm = PMF.get().getPersistenceManager();
tx =  pm.currentTransaction(); 
tx.begin();
pm.makePersistent(dataObj);
tx.commit();*

Answer 1

This is DataNucleaus Enhancement issue. Provide correct jdo files to persistent.xml and Enhance Project. Run the project when all classess enhanced(You will get message on console, how many classess were enhanced.)