BSF exception on running Ruby script with jEdit Superscript plugin

org.apache.bsf.BSFException: Exception
	at org.jruby.javasupport.bsf.JRubyEngine.exec(JRubyEngine.java:101)
	at org.apache.bsf.BSFManager$6.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.apache.bsf.BSFManager.exec(Unknown Source)
	at com.patelsoft.superscript.SuperScriptPlugin.executeScript(SuperScriptPlugin.java:149)
	at com.patelsoft.superscript.SuperScriptMacroHandler.runMacro(SuperScriptMacroHandler.java:52)
	at org.gjt.sp.jedit.Macros$Macro.invoke(Macros.java:462)
	at org.gjt.sp.jedit.gui.InputHandler.invokeAction(InputHandler.java:352)
	at org.gjt.sp.jedit.jEdit$4.invokeAction(jEdit.java:3264)
	at org.gjt.sp.jedit.jEdit$4.invokeAction(jEdit.java:3246)
	at org.gjt.sp.jedit.EditAction$Wrapper.actionPerformed(EditAction.java:222)
	at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
	at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
	at javax.swing.AbstractButton.doClick(Unknown Source)
	at javax.swing.plaf.basic.BasicMenuItemUI.doClick(Unknown Source)
	at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(Unknown Source)
	at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)
	at java.awt.Component.processMouseEvent(Unknown Source)
	at javax.swing.JComponent.processMouseEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Container.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Window.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)