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java.lang.NullPointerException at org.pentaho.di.trans.steps.userdefinedjavaclass.StepDefinition.clone(StepDefinition.java:36) at org.pentaho.di.trans.steps.userdefinedjavaclass.UserDefinedJavaClassMeta.clone(UserDefinedJavaClassMeta.java:263) at org.pentaho.di.trans.step.StepMeta.replaceMeta(StepMeta.java:476) at org.pentaho.di.trans.step.StepMeta.clone(StepMeta.java:464) at org.pentaho.di.ui.spoon.delegates.SpoonStepsDelegate.editStep(SpoonStepsDelegate.java:131) at org.pentaho.di.ui.spoon.Spoon.editStep(Spoon.java:7756) at org.pentaho.di.ui.spoon.trans.TransGraph.editStep(TransGraph.java:2756) at org.pentaho.di.ui.spoon.trans.TransGraph.mouseDoubleClick(TransGraph.java:705) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:195) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4128) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1457) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1480) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1465) at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1270) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3974) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3613) at org.pentaho.di.ui.spoon.Spoon.readAndDispatch(Spoon.java:1183) at org.pentaho.di.ui.spoon.Spoon.start(Spoon.java:6968) at org.pentaho.di.ui.spoon.Spoon.main(Spoon.java:567) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.pentaho.commons.launcher.Launcher.main(Launcher.java:134) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at apple.launcher.LaunchRunner.run(LaunchRunner.java:116) at apple.launcher.LaunchRunner.callMain(LaunchRunner.java:51) at apple.launcher.JavaApplicationLauncher.launch(JavaApplicationLauncher.java:52)