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java.lang.NullPointerException: 	at org.pentaho.di.ui.spoon.delegates.SpoonSlaveDelegate.newSlaveServer(SpoonSlaveDelegate.java:86)	at org.pentaho.di.ui.spoon.Spoon.newSlaveServer(Spoon.java:8393)	at org.pentaho.di.ui.spoon.Spoon.newSlaveServer(Spoon.java:2613)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at org.pentaho.ui.xul.impl.AbstractXulDomContainer.invoke(AbstractXulDomContainer.java:313)	at org.pentaho.ui.xul.impl.AbstractXulComponent.invoke(AbstractXulComponent.java:157)	at org.pentaho.ui.xul.impl.AbstractXulComponent.invoke(AbstractXulComponent.java:141)	at org.pentaho.ui.xul.jface.tags.JfaceMenuitem.access$100(JfaceMenuitem.java:43)	at org.pentaho.ui.xul.jface.tags.JfaceMenuitem$1.run(JfaceMenuitem.java:106)	at org.eclipse.jface.action.Action.runWithEvent(Action.java:498)	at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:545)	at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:490)	at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:402)	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:1339)	at org.pentaho.di.ui.spoon.Spoon.waitForDispose(Spoon.java:7939)	at org.pentaho.di.ui.spoon.Spoon.start(Spoon.java:9214)	at org.pentaho.di.ui.spoon.Spoon.main(Spoon.java:653)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at org.pentaho.commons.launcher.Launcher.main(Launcher.java:92)