java.lang.NullPointerException
	at org.netbeans.modules.versioning.system.cvss.ui.actions.diff.DiffMainPanel$DiffPrepareTask.run(DiffMainPanel.java:568)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:471)
[catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:904)