--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/NGSrich_0.5.5/src/exceptions/NullOrNegativeRangeException.java	Mon Nov 21 08:12:19 2011 -0500
@@ -0,0 +1,16 @@
+package exceptions;
+
+public class NullOrNegativeRangeException extends RangeException {
+
+	private static final long serialVersionUID = 1L;
+
+	public NullOrNegativeRangeException(){
+		super("The start position is bigger than or equal to the end position.");
+	}
+	
+	public NullOrNegativeRangeException(String message){
+		super(	message + "\n" +
+				"The start position is bigger than or equal to the end position.");
+	}
+	
+}