java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at org.pentaho.di.trans.steps.getxmldata.GetXMLDataMeta.getRequiredFilesDesc(GetXMLDataMeta.java:512)
at org.pentaho.di.ui.trans.steps.getxmldata.GetXMLDataDialog.getData(GetXMLDataDialog.java:1686)
at org.pentaho.di.ui.trans.steps.getxmldata.GetXMLDataDialog.open(GetXMLDataDialog.java:1206)
at org.pentaho.di.ui.spoon.delegates.SpoonStepsDelegate.editStep(SpoonStepsDelegate.java:124)
at org.pentaho.di.ui.spoon.Spoon.editStep(Spoon.java:6946)
at org.pentaho.di.ui.spoon.trans.TransGraph.editStep(TransGraph.java:2183)
at org.pentaho.di.ui.spoon.trans.TransGraph.access$2(TransGraph.java:2182)
at org.pentaho.di.ui.spoon.trans.TransGraph$6.mouseDoubleClick(TransGraph.java:439)
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.pentaho.di.ui.spoon.Spoon.readAndDispatch(Spoon.java:1006)
at org.pentaho.di.ui.spoon.Spoon.start(Spoon.java:6184)
at org.pentaho.di.ui.spoon.Spoon.main(Spoon.java:426)

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