Index: DamEngine/trunk/src/Deltares.DamEngine.Data/Standard/ComputeDoubles.cs
===================================================================
diff -u -r6404 -r7077
--- DamEngine/trunk/src/Deltares.DamEngine.Data/Standard/ComputeDoubles.cs	(.../ComputeDoubles.cs)	(revision 6404)
+++ DamEngine/trunk/src/Deltares.DamEngine.Data/Standard/ComputeDoubles.cs	(.../ComputeDoubles.cs)	(revision 7077)
@@ -1,4 +1,4 @@
-// Copyright (C) Stichting Deltares 2025. All rights reserved.
+// Copyright (C) Stichting Deltares 2026. All rights reserved.
 // 
 // This file is part of the Dam Engine.
 // 
@@ -65,7 +65,7 @@
     /// <remarks>Uses a tolerance of 1e-3.</remarks>
     public static bool IsLessThan(this double aValue1, double aValue2, double tolerance = cEpsilon)
     {
-        return !IsGreaterThanOrEqualTo(aValue1, aValue2, tolerance);
+        return !aValue1.IsGreaterThanOrEqualTo(aValue2, tolerance);
     }
 
     /// <summary>
@@ -75,7 +75,7 @@
     /// <remarks>Uses a tolerance of 1e-3.</remarks>
     public static bool IsLessThanOrEqualTo(this double aValue1, double aValue2, double tolerance = cEpsilon)
     {
-        return !IsGreaterThan(aValue1, aValue2, tolerance);
+        return !aValue1.IsGreaterThan(aValue2, tolerance);
     }
 
     /// <summary>