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via GitHub by gebner
, 1 year ago
This exception has no message.
java.lang.NullPointerException: 	at scala.swing.RootPanel$class.contents_$eq(RootPanel.scala:36)	at scala.swing.Window.contents_$eq(Window.scala:42)	at at.logic.gapt.prooftool.ProofToolViewer.(ProofToolViewer.scala:120)	at at.logic.gapt.prooftool.ScrollableProofToolViewer.(ProofToolViewer.scala:359)	at at.logic.gapt.prooftool.DagProofViewer.(SequentProofViewer.scala:23)	at at.logic.gapt.prooftool.SequentProofViewer.(SequentProofViewer.scala:36)	at at.logic.gapt.prooftool.LKProofViewer.(SequentProofViewer.scala:94)	at at.logic.gapt.prooftool.prooftool$.apply(ProofToolViewer.scala:39)