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org.netbeans.mdr.util.DebugException: Fatal error: Repository boot/initialization failed with message: Unable to delete btree repository mdr	at org.netbeans.mdr.NBMDRepositoryImpl.initCheck(NBMDRepositoryImpl.java:768)	at org.netbeans.mdr.NBMDRepositoryImpl.getExtent(NBMDRepositoryImpl.java:308)	at org.pentaho.pms.core.CWM.getRepository(CWM.java:481)	at org.pentaho.pms.core.CWM.getRepository(CWM.java:452)	at org.pentaho.pms.core.CWM.getRepositoryInstance(CWM.java:442)	at org.pentaho.pms.core.CWM.(CWM.java:364)	at org.pentaho.pms.core.CWM.getInstance(CWM.java:532)	at org.pentaho.pms.core.CWM.getInstance(CWM.java:504)	at org.pentaho.pms.mql.MQLQueryImpl.fromXML(MQLQueryImpl.java:455)	at org.pentaho.pms.mql.MQLQueryImpl.fromXML(MQLQueryImpl.java:414)	at org.pentaho.pms.mql.MQLQueryImpl.(MQLQueryImpl.java:106)	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)	at java.lang.reflect.Constructor.newInstance(Constructor.java:494)	at org.pentaho.pms.mql.MQLQueryFactory.getMQLQuery(MQLQueryFactory.java:50)	at org.pentaho.pms.mql.MQLQueryFactory.getMQLQuery(MQLQueryFactory.java:35)	at org.pentaho.pms.ui.MetaEditor.loadQuery(MetaEditor.java:3807)	at org.pentaho.pms.ui.MetaEditor.(MetaEditor.java:315)	at org.pentaho.pms.ui.MetaEditor.main(MetaEditor.java:3556)