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org.netbeans.api.mdr.CreationFailedException: Cannot instantiate package because of unexpected exception: java.lang.NullPointerException	at org.netbeans.mdr.NBMDRepositoryImpl.createExtent(NBMDRepositoryImpl.java:494)	at org.netbeans.mdr.NBMDRepositoryImpl.createExtent(NBMDRepositoryImpl.java:297)	at org.netbeans.mdr.NBMDRepositoryImpl.createExtent(NBMDRepositoryImpl.java:285)	at org.pentaho.pms.core.CWM.(CWM.java:395)	at org.pentaho.pms.core.CWM.getInstance(CWM.java:526)	at org.pentaho.pms.core.CWM.getInstance(CWM.java:498)	at org.pentaho.pms.factory.SchemaSaveProgressDialog$1.run(SchemaSaveProgressDialog.java:79)	at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:369)	at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:313)	at org.eclipse.jface.dialogs.ProgressMonitorDialog.run(ProgressMonitorDialog.java:495)	at org.pentaho.pms.factory.SchemaSaveProgressDialog.open(SchemaSaveProgressDialog.java:151)	at org.pentaho.pms.editor.MetaEditor.save(MetaEditor.java:2955)	at org.pentaho.pms.editor.MetaEditor.saveFile(MetaEditor.java:2914)	at org.pentaho.pms.editor.MetaEditor$13.handleEvent(MetaEditor.java:490)	at org.eclipse.swt.widgets.EventTable.sendEvent(Unknown Source)	at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)	at org.eclipse.swt.widgets.Display.runDeferredEvents(Unknown Source)	at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)	at org.pentaho.pms.editor.MetaEditor.readAndDispatch(MetaEditor.java:810)	at org.pentaho.pms.editor.MetaEditor.main(MetaEditor.java:3588)