Index: Ringtoets/Piping/src/Ringtoets.Piping.IO/Builders/SoilLayer2D.cs
===================================================================
diff -u -r7ae9100ff4e61169edcefaeb01b72d492431742f -re45d53ab48741d0112dca1ad6bb6cf199535c8b7
--- Ringtoets/Piping/src/Ringtoets.Piping.IO/Builders/SoilLayer2D.cs	(.../SoilLayer2D.cs)	(revision 7ae9100ff4e61169edcefaeb01b72d492431742f)
+++ Ringtoets/Piping/src/Ringtoets.Piping.IO/Builders/SoilLayer2D.cs	(.../SoilLayer2D.cs)	(revision e45d53ab48741d0112dca1ad6bb6cf199535c8b7)
@@ -24,6 +24,7 @@
 using System.Collections.ObjectModel;
 using System.Linq;
 using Core.Common.Base.Geometry;
+using Ringtoets.Piping.IO.Exceptions;
 using Ringtoets.Piping.IO.Properties;
 using Ringtoets.Piping.Primitives;