Index: Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Forms/PropertyClasses/MacroStabilityInwardsSlipPlaneSettingsProperties.cs =================================================================== diff -u -r54c11693eeccda9e154946428d93786face46a9e -rc2b77b22666a09fdc2348440c76cd37325aeba7d --- Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Forms/PropertyClasses/MacroStabilityInwardsSlipPlaneSettingsProperties.cs (.../MacroStabilityInwardsSlipPlaneSettingsProperties.cs) (revision 54c11693eeccda9e154946428d93786face46a9e) +++ Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.Forms/PropertyClasses/MacroStabilityInwardsSlipPlaneSettingsProperties.cs (.../MacroStabilityInwardsSlipPlaneSettingsProperties.cs) (revision c2b77b22666a09fdc2348440c76cd37325aeba7d) @@ -58,6 +58,7 @@ { throw new ArgumentNullException(nameof(data)); } + if (handler == null) { throw new ArgumentNullException(nameof(handler));