Weka Scoring

Hello everyone,

I have installed the plug-in Weka Scoring in PDI 6. When I open the plug-in to edit it and I click on Browse... in Load/Import model, I get the error below. I cannot even select a file to import the model. Can anyone help me?


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An unexpected error occurred in Spoon:
org.pentaho.di.core.vfs.KettleVFS.getFileObject(Ljava/lang/String;)Lorg/apache/commons/vfs/FileObject;
java.lang.NoSuchMethodError: org.pentaho.di.core.vfs.KettleVFS.getFileObject(Ljava/lang/String;)Lorg/apache/commons/vfs/FileObject;
at org.pentaho.di.scoring.WekaScoringDialog$11.widgetSelected(WekaScoringDialog.java:738)
at org.eclipse.swt.widgets.TypedListener.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.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)