Index: trunk/src/Dam/Data/Stability/StabilityCalculation.cs
===================================================================
diff -u -r7 -r111
--- trunk/src/Dam/Data/Stability/StabilityCalculation.cs	(.../StabilityCalculation.cs)	(revision 7)
+++ trunk/src/Dam/Data/Stability/StabilityCalculation.cs	(.../StabilityCalculation.cs)	(revision 111)
@@ -7,6 +7,7 @@
 using System.Xml.Linq;
 using Deltares.Dam.Data.Assemblers;
 using Deltares.Geotechnics;
+using Deltares.Geotechnics.SurfaceLines;
 using Deltares.Standard;
 using Deltares.Standard.IO.Xml;
 using Deltares.Standard.Logging;