org.pentaho.ui.xul.XulException: Could not find Event Handler with the key : mainController

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Could not find Event Handler with the key : mainController
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org.pentaho.ui.xul.XulException: Could not find Event Handler with the key : mainController
at org.pentaho.ui.xul.impl.AbstractXulDomContainer.getEventHandler(AbstractXulDomContainer.java:117)
at org.pentaho.di.ui.repository.repositoryexplorer.controllers.FileOverwriteDialogController.init(FileOverwriteDialogController.java:114)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.pentaho.ui.xul.impl.AbstractXulDomContainer.invoke(AbstractXulDomContainer.java:313)
at org.pentaho.ui.xul.impl.AbstractXulDomContainer.initialize(AbstractXulDomContainer.java:141)
at org.pentaho.ui.xul.swt.SwtXulRunner$1.run(SwtXulRunner.java:67)
at org.eclipse.swt.widgets.Synchronizer.syncExec(Unknown Source)
at org.pentaho.ui.xul.swt.SwtXulRunner.initialize(SwtXulRunner.java:64)
at org.pentaho.di.ui.repository.repositoryexplorer.controllers.FileOverwriteDialogController.getInstance(FileOverwriteDialogController.java:95)
at org.pentaho.di.ui.repository.repositoryexplorer.controllers.BrowseController.onDrop(BrowseController.java:687)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.pentaho.ui.xul.impl.AbstractXulDomContainer.invoke(AbstractXulDomContainer.java:305)
at org.pentaho.ui.xul.swt.SwtElement$3.drop(SwtElement.java:724)
at org.eclipse.swt.dnd.DNDListener.handleEvent(Unknown Source)
at org.eclipse.swt.widgets.EventTable.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Widget.notifyListeners(Unknown Source)
at org.eclipse.swt.dnd.DropTarget.Drop(Unknown Source)
at org.eclipse.swt.dnd.DropTarget.Drop_64(Unknown Source)
at org.eclipse.swt.internal.ole.win32.COMObject.callback6(Unknown Source)
at org.eclipse.swt.internal.ole.win32.COM.DoDragDrop(Native Method)
at org.eclipse.swt.dnd.DragSource.drag(Unknown Source)
at org.eclipse.swt.dnd.DragSource.access$000(Unknown Source)
at org.eclipse.swt.dnd.DragSource$1.handleEvent(Unknown Source)
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.jface.window.Window.runEventLoop(Window.java:820)
at org.pentaho.di.ui.xul.KettleDialog.show(KettleDialog.java:73)
at org.pentaho.di.ui.xul.KettleDialog.show(KettleDialog.java:42)
at org.pentaho.di.ui.repository.repositoryexplorer.RepositoryExplorer.show(RepositoryExplorer.java:152)
at org.pentaho.di.ui.spoon.Spoon$25$1.run(Spoon.java:3995)
at org.eclipse.swt.widgets.RunnableLock.run(Unknown Source)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Unknown Source)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Unknown Source)
at org.pentaho.di.ui.spoon.Spoon.readAndDispatch(Spoon.java:1316)
at org.pentaho.di.ui.spoon.Spoon.waitForDispose(Spoon.java:7954)
at org.pentaho.di.ui.spoon.Spoon.start(Spoon.java:9285)
at org.pentaho.di.ui.spoon.Spoon.main(Spoon.java:654)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.pentaho.commons.launcher.Launcher.main(Launcher.java:92)

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