Application crashes when trying to delete data at the end of the file

[svoki]

I wanted to delete data at the end of the ecg data to remove the artefacts created by taking off the EcgMove3 sensor. I accidently marked a very small portion containing no data and the application crashed.

java.lang.NullPointerException
at de.fzi.ekgeditor.Gui.Forms.Dialog_PreviewCut.createSampleLabels(Dialog_PreviewCut.java:62)
at de.fzi.ekgeditor.Gui.Forms.Dialog_PreviewCut.open(Dialog_PreviewCut.java:108)
at de.fzi.ekgeditor.Gui.Menu.MenuCommon.menu_remove(MenuCommon.java:195)
at de.fzi.ekgeditor.Gui.Menu.ContextMenu$3.widgetSelected(ContextMenu.java:56)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:249)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:86)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4428)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1079)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4238)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3817)
at de.fzi.ekgeditor.Gui.Forms.Form_Main.Run(Form_Main.java:616)
at de.fzi.ekgeditor.EKGEditor.(EKGEditor.java:76)
at de.fzi.ekgeditor.EKGEditor.main(EKGEditor.java:92)