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java.lang.NullPointerException: 	at org.pentaho.di.core.database.Database.initializeVariablesFrom(Database.java:4544)	at org.pentaho.di.repository.Repository.connect(Repository.java:615)	at org.pentaho.di.repository.Repository.connect(Repository.java:597)	at org.pentaho.di.ui.repository.dialog.RepositoriesDialog.ok(RepositoriesDialog.java:505)	at org.pentaho.di.ui.repository.dialog.RepositoriesDialog.access$900(RepositoriesDialog.java:73)	at org.pentaho.di.ui.repository.dialog.RepositoriesDialog$7.handleEvent(RepositoriesDialog.java:365)	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.di.ui.spoon.Spoon.readAndDispatch(Spoon.java:945)	at org.pentaho.di.ui.spoon.Spoon.start(Spoon.java:5574)	at org.pentaho.di.ui.spoon.Spoon.main(Spoon.java:412)