java.lang.NullPointerException
   at org.netbeans.api.java.source.JavaSource.<init>(JavaSource.java:349)
   at org.netbeans.api.java.source.JavaSource._create(JavaSource.java:214)
   at org.netbeans.api.java.source.JavaSource.create(JavaSource.java:192)
   at org.netbeans.modules.j2ee.persistence.wizard.fromdb.JavaPersistenceGenerator$Generator.runImpl(JavaPersistenceGenerator.java:493)
   at org.netbeans.modules.j2ee.persistence.wizard.fromdb.JavaPersistenceGenerator$Generator.run(JavaPersistenceGenerator.java:376)
   at org.netbeans.modules.j2ee.persistence.wizard.fromdb.JavaPersistenceGenerator.generateBeans(JavaPersistenceGenerator.java:210)
   at org.netbeans.modules.j2ee.persistence.wizard.fromdb.JavaPersistenceGenerator.generateBeans(JavaPersistenceGenerator.java:178)
   at org.netbeans.modules.j2ee.persistence.wizard.fromdb.RelatedCMPWizard.createBeans(RelatedCMPWizard.java:385)
   at org.netbeans.modules.j2ee.persistence.wizard.fromdb.RelatedCMPWizard.access$000(RelatedCMPWizard.java:87)
   at org.netbeans.modules.j2ee.persistence.wizard.fromdb.RelatedCMPWizard$1.run(RelatedCMPWizard.java:294)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1960)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.NullPointerException
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:421)
   at org.netbeans.modules.j2ee.persistence.wizard.fromdb.RelatedCMPWizard$2.run(RelatedCMPWizard.java:324)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:138)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)