Index: Ringtoets/Piping/src/Ringtoets.Piping.Forms/Views/PipingChartDataFactory.cs
===================================================================
diff -u -r399dd53d2efa4adb1a3010184e38515b65cef723 -r166f0d43e8e9d8820a7b95503ed2196d0fc54741
--- Ringtoets/Piping/src/Ringtoets.Piping.Forms/Views/PipingChartDataFactory.cs	(.../PipingChartDataFactory.cs)	(revision 399dd53d2efa4adb1a3010184e38515b65cef723)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Forms/Views/PipingChartDataFactory.cs	(.../PipingChartDataFactory.cs)	(revision 166f0d43e8e9d8820a7b95503ed2196d0fc54741)
@@ -161,13 +161,19 @@
         /// <param name="soilProfile">The <see cref="PipingSoilProfile"/> which contains the <see cref="PipingSoilLayer"/>.</param>
         /// <returns>The created <see cref="ChartMultipleAreaData"/>.</returns>
         /// <exception cref="ArgumentNullException">Thrown when <paramref name="soilProfile"/> is <c>null</c>.</exception>
+        /// <exception cref="ArgumentOutOfRangeException">Thrown when <paramref name="soilLayerIndex"/> is outside the allowable range of values ([0, number_of_soil_layers>).</exception>
         public static ChartMultipleAreaData CreateSoilLayerChartData(int soilLayerIndex, PipingSoilProfile soilProfile)
         {
             if (soilProfile == null)
             {
                 throw new ArgumentNullException("soilProfile");
             }
 
+            if (soilLayerIndex < 0 || soilLayerIndex >= soilProfile.Layers.Count())
+            {
+                throw new ArgumentOutOfRangeException("soilLayerIndex");
+            }
+
             var soilLayer = soilProfile.Layers.ElementAt(soilLayerIndex);
 
             return new ChartMultipleAreaData(string.Format("{0} {1}", soilLayerIndex + 1, soilLayer.MaterialName))