Index: Ringtoets/Common/src/Ringtoets.Common.Forms/TreeNodeInfos/RingtoetsContextMenuBuilder.cs
===================================================================
diff -u -r0a1752d24408af81508bc81d154293be23c9c4ea -r578037b5080f7a4820286ea02c6b4c322a8b1b09
--- Ringtoets/Common/src/Ringtoets.Common.Forms/TreeNodeInfos/RingtoetsContextMenuBuilder.cs	(.../RingtoetsContextMenuBuilder.cs)	(revision 0a1752d24408af81508bc81d154293be23c9c4ea)
+++ Ringtoets/Common/src/Ringtoets.Common.Forms/TreeNodeInfos/RingtoetsContextMenuBuilder.cs	(.../RingtoetsContextMenuBuilder.cs)	(revision 578037b5080f7a4820286ea02c6b4c322a8b1b09)
@@ -111,15 +111,17 @@
         /// <param name="calculation">The calculation to perform.</param>
         /// <param name="calculationContext">The calculation context belonging to the calculation.</param>
         /// <param name="calculateAction">The action that performs the calculation.</param>
+        /// <param name="isEnabledFunc">The func that checks if the item is enabled.</param>
         /// <returns>The <see cref="RingtoetsContextMenuBuilder"/> itself.</returns>
         public RingtoetsContextMenuBuilder AddPerformCalculationItem<TCalculation, TCalculationContext>(
             TCalculation calculation,
             TCalculationContext calculationContext,
-            Action<TCalculation, TCalculationContext> calculateAction)
+            Action<TCalculation, TCalculationContext> calculateAction,
+            Func<TCalculationContext, bool> isEnabledFunc)
             where TCalculationContext : ICalculationContext<TCalculation, IFailureMechanism>
             where TCalculation : ICalculation
         {
-            contextMenuBuilder.AddCustomItem(ringtoetsContextMenuItemFactory.CreatePerformCalculationItem(calculation, calculationContext, calculateAction));
+            contextMenuBuilder.AddCustomItem(ringtoetsContextMenuItemFactory.CreatePerformCalculationItem(calculation, calculationContext, calculateAction, isEnabledFunc));
             return this;
         }
 
Index: Ringtoets/Common/src/Ringtoets.Common.Forms/TreeNodeInfos/RingtoetsContextMenuItemFactory.cs
===================================================================
diff -u -r0a1752d24408af81508bc81d154293be23c9c4ea -r578037b5080f7a4820286ea02c6b4c322a8b1b09
--- Ringtoets/Common/src/Ringtoets.Common.Forms/TreeNodeInfos/RingtoetsContextMenuItemFactory.cs	(.../RingtoetsContextMenuItemFactory.cs)	(revision 0a1752d24408af81508bc81d154293be23c9c4ea)
+++ Ringtoets/Common/src/Ringtoets.Common.Forms/TreeNodeInfos/RingtoetsContextMenuItemFactory.cs	(.../RingtoetsContextMenuItemFactory.cs)	(revision 578037b5080f7a4820286ea02c6b4c322a8b1b09)
@@ -130,19 +130,24 @@
         /// <param name="calculation">The calculation to perform.</param>
         /// <param name="calculationContext">The calculation context belonging to the calculation.</param>
         /// <param name="calculateAction">The action that performs the calculation.</param>
+        /// <param name="isEnabledFunc">The func that checks if the item is enabled.</param>
         /// <returns>The created <see cref="StrictContextMenuItem"/>.</returns>
         public StrictContextMenuItem CreatePerformCalculationItem<TCalculation, TCalculationContext>(
             TCalculation calculation,
             TCalculationContext calculationContext,
-            Action<TCalculation, TCalculationContext> calculateAction)
+            Action<TCalculation, TCalculationContext> calculateAction,
+            Func<TCalculationContext, bool> isEnabledFunc)
             where TCalculationContext : ICalculationContext<TCalculation, IFailureMechanism>
             where TCalculation : ICalculation
         {
             return new StrictContextMenuItem(
                 Resources.Calculate,
                 Resources.Calculate_ToolTip,
                 Resources.CalculateIcon,
-                (o, args) => calculateAction(calculation, calculationContext));
+                (o, args) => calculateAction(calculation, calculationContext))
+            {
+                Enabled = isEnabledFunc(calculationContext)
+            };
         }
 
         /// <summary>
Index: Ringtoets/Common/test/Ringtoets.Common.Forms.Test/TreeNodeInfos/RingtoetsContextMenuBuilderTest.cs
===================================================================
diff -u -rec8ec68f9a97921ccca392be5c29eff514266cfa -r578037b5080f7a4820286ea02c6b4c322a8b1b09
--- Ringtoets/Common/test/Ringtoets.Common.Forms.Test/TreeNodeInfos/RingtoetsContextMenuBuilderTest.cs	(.../RingtoetsContextMenuBuilderTest.cs)	(revision ec8ec68f9a97921ccca392be5c29eff514266cfa)
+++ Ringtoets/Common/test/Ringtoets.Common.Forms.Test/TreeNodeInfos/RingtoetsContextMenuBuilderTest.cs	(.../RingtoetsContextMenuBuilderTest.cs)	(revision 578037b5080f7a4820286ea02c6b4c322a8b1b09)
@@ -268,7 +268,7 @@
             var ringtoetsContextMenuBuilder = new RingtoetsContextMenuBuilder(contextMenuBuilder);
 
             // Call
-            var result = ringtoetsContextMenuBuilder.AddPerformCalculationItem(calculation, calculationContext, null).Build();
+            var result = ringtoetsContextMenuBuilder.AddPerformCalculationItem(calculation, calculationContext, null, context => true).Build();
 
             // Assert
             Assert.IsInstanceOf<ContextMenuStrip>(result);
Index: Ringtoets/Common/test/Ringtoets.Common.Forms.Test/TreeNodeInfos/RingtoetsContextMenuItemFactoryTest.cs
===================================================================
diff -u -rec8ec68f9a97921ccca392be5c29eff514266cfa -r578037b5080f7a4820286ea02c6b4c322a8b1b09
--- Ringtoets/Common/test/Ringtoets.Common.Forms.Test/TreeNodeInfos/RingtoetsContextMenuItemFactoryTest.cs	(.../RingtoetsContextMenuItemFactoryTest.cs)	(revision ec8ec68f9a97921ccca392be5c29eff514266cfa)
+++ Ringtoets/Common/test/Ringtoets.Common.Forms.Test/TreeNodeInfos/RingtoetsContextMenuItemFactoryTest.cs	(.../RingtoetsContextMenuItemFactoryTest.cs)	(revision 578037b5080f7a4820286ea02c6b4c322a8b1b09)
@@ -390,7 +390,7 @@
         }
 
         [Test]
-        public void CreatePerformCalculationItem_Always_CreatesDecoratedItem()
+        public void CreatePerformCalculationItem_IsEnabledFuncTrue_CreatesDecoratedAndEnabledItem()
         {
             // Setup
             var mocks = new MockRepository();
@@ -402,7 +402,7 @@
             var calculationContext = new TestCalculationContext(calculation, failureMechanismMock);
 
             // Call
-            var toolStripItem = factory.CreatePerformCalculationItem(calculation, calculationContext, null);
+            var toolStripItem = factory.CreatePerformCalculationItem(calculation, calculationContext, null, context => true);
 
             // Assert
             Assert.AreEqual(RingtoetsFormsResources.Calculate, toolStripItem.Text);
@@ -414,6 +414,30 @@
         }
 
         [Test]
+        public void CreatePerformCalculationItem_IsEnabledFuncFalse_CreatesDecoratedAndDisabledItem()
+        {
+            // Setup
+            var mocks = new MockRepository();
+            var failureMechanisMock = mocks.StrictMock<IFailureMechanism>();
+
+            mocks.ReplayAll();
+
+            var calculation = new TestCalculation();
+            var calculationContext = new TestCalculationContext(calculation, failureMechanisMock);
+
+            // Call
+            var toolStripItem = factory.CreatePerformCalculationItem(calculation, calculationContext, null, context => false);
+
+            // Assert
+            Assert.AreEqual(RingtoetsFormsResources.Calculate, toolStripItem.Text);
+            Assert.AreEqual(RingtoetsFormsResources.Calculate_ToolTip, toolStripItem.ToolTipText);
+            TestHelper.AssertImagesAreEqual(RingtoetsFormsResources.CalculateIcon, toolStripItem.Image);
+            Assert.IsFalse(toolStripItem.Enabled);
+
+            mocks.VerifyAll();
+        }
+
+        [Test]
         public void CreatePerformCalculationItem_PerformClickOnCreatedItem_PerformCalculationMethod()
         {
             // Setup
@@ -426,7 +450,7 @@
             var calculationContext = new TestCalculationContext(calculation, failureMechanismMock);
 
             var counter = 0;
-            var toolStripItem = factory.CreatePerformCalculationItem(calculation, calculationContext, (calc, context) => counter++);
+            var toolStripItem = factory.CreatePerformCalculationItem(calculation, calculationContext, (calc, context) => counter++, context => true);
 
             // Call
             toolStripItem.PerformClick();
Index: Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Plugin/GrassCoverErosionInwardsGuiPlugin.cs
===================================================================
diff -u -r0a1752d24408af81508bc81d154293be23c9c4ea -r578037b5080f7a4820286ea02c6b4c322a8b1b09
--- Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Plugin/GrassCoverErosionInwardsGuiPlugin.cs	(.../GrassCoverErosionInwardsGuiPlugin.cs)	(revision 0a1752d24408af81508bc81d154293be23c9c4ea)
+++ Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Plugin/GrassCoverErosionInwardsGuiPlugin.cs	(.../GrassCoverErosionInwardsGuiPlugin.cs)	(revision 578037b5080f7a4820286ea02c6b4c322a8b1b09)
@@ -412,7 +412,7 @@
 
             GrassCoverErosionInwardsCalculation calculation = nodeData.WrappedData;
 
-            return builder.AddPerformCalculationItem(calculation, nodeData, PerformCalculation)
+            return builder.AddPerformCalculationItem(calculation, nodeData, PerformCalculation, EnablePerformCalculation)
                           .AddClearCalculationOutputItem(calculation)
                           .AddSeparator()
                           .AddRenameItem()
@@ -428,6 +428,11 @@
                           .Build();
         }
 
+        private bool EnablePerformCalculation(GrassCoverErosionInwardsCalculationContext context)
+        {
+            return context.AssessmentSection.HydraulicBoundaryDatabase != null && context.FailureMechanism.Sections.Any();
+        }
+
         private void PerformCalculation(GrassCoverErosionInwardsCalculation calculation, GrassCoverErosionInwardsCalculationContext context)
         {
             var activity = CreateHydraRingTargetProbabilityCalculationActivity(
Index: Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Forms.Test/TreeNodeInfos/GrassCoverErosionInwardsCalculationContextTreeNodeInfoTest.cs
===================================================================
diff -u -r266b001fc7fcb405383d2411a970efa735e3c66d -r578037b5080f7a4820286ea02c6b4c322a8b1b09
--- Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Forms.Test/TreeNodeInfos/GrassCoverErosionInwardsCalculationContextTreeNodeInfoTest.cs	(.../GrassCoverErosionInwardsCalculationContextTreeNodeInfoTest.cs)	(revision 266b001fc7fcb405383d2411a970efa735e3c66d)
+++ Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Forms.Test/TreeNodeInfos/GrassCoverErosionInwardsCalculationContextTreeNodeInfoTest.cs	(.../GrassCoverErosionInwardsCalculationContextTreeNodeInfoTest.cs)	(revision 578037b5080f7a4820286ea02c6b4c322a8b1b09)
@@ -139,6 +139,7 @@
 
             var failureMechanism = new GrassCoverErosionInwardsFailureMechanism();
             var assessmentSectionMock = mocks.StrictMock<IAssessmentSection>();
+            assessmentSectionMock.Expect(asm => asm.HydraulicBoundaryDatabase).Return(null);
             var calculation = new GrassCoverErosionInwardsCalculation(new GeneralGrassCoverErosionInwardsInput());
             
             var nodeData = new GrassCoverErosionInwardsCalculationContext(calculation, failureMechanism, assessmentSectionMock);
@@ -157,14 +158,16 @@
         }
 
         [Test]
-        public void ContextMenuStrip_CalculationWithoutOutput_ContextMenuItemClearOutputDisabled()
+        public void ContextMenuStrip_NoHydraulicDatabaseAndFailureMechanismSections_ContextMenuItemPerformCalculationDisabled()
         {
             // Setup
             var gui = mocks.StrictMock<IGui>();
             var treeViewControlMock = mocks.StrictMock<TreeViewControl>();
 
             var failureMechanism = new GrassCoverErosionInwardsFailureMechanism();
             var assessmentSectionMock = mocks.StrictMock<IAssessmentSection>();
+            assessmentSectionMock.Expect(asm => asm.HydraulicBoundaryDatabase).Return(null);
+
             var calculation = new GrassCoverErosionInwardsCalculation(new GeneralGrassCoverErosionInwardsInput());
 
             var nodeData = new GrassCoverErosionInwardsCalculationContext(calculation, failureMechanism, assessmentSectionMock);
@@ -181,7 +184,68 @@
             // Assert
             mocks.VerifyAll(); // Expect no calls on arguments
 
+            TestHelper.AssertContextMenuStripContainsItem(contextMenu, 0, RingtoetsCommonFormsResources.Calculate, RingtoetsCommonFormsResources.Calculate_ToolTip, RingtoetsCommonFormsResources.CalculateIcon, false);
+        }
+
+        [Test]
+        public void ContextMenuStrip_HydraulicDatabaseAndFailureMechanismSectionsSet_ContextMenuItemPerformCalculationEnabled()
+        {
+            // Setup
+            var gui = mocks.StrictMock<IGui>();
+            var treeViewControlMock = mocks.StrictMock<TreeViewControl>();
+
+            var failureMechanism = new GrassCoverErosionInwardsFailureMechanism();
+            failureMechanism.AddSection(new FailureMechanismSection("test", new[] { new Point2D(0, 0) }));
+
+            var assessmentSectionMock = mocks.StrictMock<IAssessmentSection>();
+            assessmentSectionMock.Expect(asm => asm.HydraulicBoundaryDatabase).Return(new HydraulicBoundaryDatabase());
+
+            var calculation = new GrassCoverErosionInwardsCalculation(new GeneralGrassCoverErosionInwardsInput());
+
+            var nodeData = new GrassCoverErosionInwardsCalculationContext(calculation, failureMechanism, assessmentSectionMock);
+
+            gui.Expect(cmp => cmp.Get(nodeData, treeViewControlMock)).Return(new CustomItemsOnlyContextMenuBuilder());
+
+            mocks.ReplayAll();
+
+            plugin.Gui = gui;
+
+            // Call
+            var contextMenu = info.ContextMenuStrip(nodeData, null, treeViewControlMock);
+
+            // Assert
+            mocks.VerifyAll(); // Expect no calls on arguments
+
             TestHelper.AssertContextMenuStripContainsItem(contextMenu, 0, RingtoetsCommonFormsResources.Calculate, RingtoetsCommonFormsResources.Calculate_ToolTip, RingtoetsCommonFormsResources.CalculateIcon);
+        }
+
+        [Test]
+        public void ContextMenuStrip_CalculationWithoutOutput_ContextMenuItemClearOutputDisabled()
+        {
+            // Setup
+            var gui = mocks.StrictMock<IGui>();
+            var treeViewControlMock = mocks.StrictMock<TreeViewControl>();
+
+            var failureMechanism = new GrassCoverErosionInwardsFailureMechanism();
+            var assessmentSectionMock = mocks.StrictMock<IAssessmentSection>();
+            assessmentSectionMock.Expect(asm => asm.HydraulicBoundaryDatabase).Return(new HydraulicBoundaryDatabase());
+
+            var calculation = new GrassCoverErosionInwardsCalculation(new GeneralGrassCoverErosionInwardsInput());
+
+            var nodeData = new GrassCoverErosionInwardsCalculationContext(calculation, failureMechanism, assessmentSectionMock);
+
+            gui.Expect(cmp => cmp.Get(nodeData, treeViewControlMock)).Return(new CustomItemsOnlyContextMenuBuilder());
+
+            mocks.ReplayAll();
+
+            plugin.Gui = gui;
+
+            // Call
+            var contextMenu = info.ContextMenuStrip(nodeData, null, treeViewControlMock);
+
+            // Assert
+            mocks.VerifyAll(); // Expect no calls on arguments
+
             TestHelper.AssertContextMenuStripContainsItem(contextMenu, 1, RingtoetsCommonFormsResources.Clear_output, RingtoetsCommonFormsResources.ClearOutput_No_output_to_clear, RingtoetsCommonFormsResources.ClearIcon, false);
         }
 
@@ -193,6 +257,7 @@
 
             var failureMechanism = new GrassCoverErosionInwardsFailureMechanism();
             var assessmentSectionMock = mocks.StrictMock<IAssessmentSection>();
+            assessmentSectionMock.Expect(asm => asm.HydraulicBoundaryDatabase).Return(null);
             var calculation = new GrassCoverErosionInwardsCalculation(new GeneralGrassCoverErosionInwardsInput())
             {
                 Output = new GrassCoverErosionInwardsOutput(0, 0, 0, 0, 0)
@@ -212,7 +277,6 @@
             // Assert
             mocks.VerifyAll(); // Expect no calls on arguments
 
-            TestHelper.AssertContextMenuStripContainsItem(contextMenu, 0, RingtoetsCommonFormsResources.Calculate, RingtoetsCommonFormsResources.Calculate_ToolTip, RingtoetsCommonFormsResources.CalculateIcon);
             TestHelper.AssertContextMenuStripContainsItem(contextMenu, 1, RingtoetsCommonFormsResources.Clear_output, RingtoetsCommonFormsResources.Clear_output_ToolTip, RingtoetsCommonFormsResources.ClearIcon);
         }
 
@@ -228,6 +292,7 @@
             
             var failureMechanism = new GrassCoverErosionInwardsFailureMechanism();
             var assessmentSectionMock = mocks.StrictMock<IAssessmentSection>();
+            assessmentSectionMock.Expect(asm => asm.HydraulicBoundaryDatabase).Return(null);
             var calculation = new GrassCoverErosionInwardsCalculation(new GeneralGrassCoverErosionInwardsInput());
 
             var calculationContext = new GrassCoverErosionInwardsCalculationContext(calculation, failureMechanism, assessmentSectionMock);
@@ -311,7 +376,7 @@
             };
 
             var assessmentSectionMock = mocks.StrictMock<IAssessmentSection>();
-            assessmentSectionMock.Expect(asm => asm.HydraulicBoundaryDatabase).Return(hydraulicBoundaryDatabase);
+            assessmentSectionMock.Stub(asm => asm.HydraulicBoundaryDatabase).Return(hydraulicBoundaryDatabase);
             var calculationOutput = new GrassCoverErosionInwardsOutput(double.NaN, double.NaN, double.NaN, double.NaN, double.NaN);
             var calculation = new GrassCoverErosionInwardsCalculation(new GeneralGrassCoverErosionInwardsInput())
             {
Index: Ringtoets/HydraRing/src/Ringtoets.HydraRing.Calculation/Activities/HydraRingActivityFactory.cs
===================================================================
diff -u -rdec46d5efaad5332ffb2a96e67ec11209ddc5515 -r578037b5080f7a4820286ea02c6b4c322a8b1b09
--- Ringtoets/HydraRing/src/Ringtoets.HydraRing.Calculation/Activities/HydraRingActivityFactory.cs	(.../HydraRingActivityFactory.cs)	(revision dec46d5efaad5332ffb2a96e67ec11209ddc5515)
+++ Ringtoets/HydraRing/src/Ringtoets.HydraRing.Calculation/Activities/HydraRingActivityFactory.cs	(.../HydraRingActivityFactory.cs)	(revision 578037b5080f7a4820286ea02c6b4c322a8b1b09)
@@ -89,11 +89,6 @@
                                                            HydraRingUncertaintiesType uncertaintiesType, HydraRingCalculationInput hydraRingCalculationInput,
                                                            object action)
         {
-            if (string.IsNullOrEmpty(name))
-            {
-                throw new ArgumentException(@"Name should be set.", "name");
-            }
-
             if (string.IsNullOrEmpty(hlcdDirectory))
             {
                 throw new ArgumentException(@"HLCD directory should be set.", "hlcdDirectory");
Index: Ringtoets/HydraRing/test/Ringtoets.HydraRing.Calculation.Test/Activities/HydraRingActivityFactoryTest.cs
===================================================================
diff -u -rdec46d5efaad5332ffb2a96e67ec11209ddc5515 -r578037b5080f7a4820286ea02c6b4c322a8b1b09
--- Ringtoets/HydraRing/test/Ringtoets.HydraRing.Calculation.Test/Activities/HydraRingActivityFactoryTest.cs	(.../HydraRingActivityFactoryTest.cs)	(revision dec46d5efaad5332ffb2a96e67ec11209ddc5515)
+++ Ringtoets/HydraRing/test/Ringtoets.HydraRing.Calculation.Test/Activities/HydraRingActivityFactoryTest.cs	(.../HydraRingActivityFactoryTest.cs)	(revision 578037b5080f7a4820286ea02c6b4c322a8b1b09)
@@ -35,23 +35,6 @@
         #region ExceedanceProbabilityCalculationInput
 
         [Test]
-        public void CreateExceedanceProbabilityCalculationInput_InputEmptyName_ThrowsArgumentException()
-        {
-            // Setup
-            var mocks = new MockRepository();
-            var exceedanceProbabilityCalculationInput = mocks.StrictMock<ExceedanceProbabilityCalculationInput>(1);
-
-            mocks.ReplayAll();
-
-            // Call
-            TestDelegate test = () => HydraRingActivityFactory.Create("", "hlcdDirectory", "ringId", HydraRingTimeIntegrationSchemeType.FBC, HydraRingUncertaintiesType.All, exceedanceProbabilityCalculationInput, output => { });
-
-            // Assert
-            var exception = Assert.Throws<ArgumentException>(test, "Name should be set.");
-            Assert.AreEqual("name", exception.ParamName);
-        }
-
-        [Test]
         public void CreateExceedanceProbabilityCalculationInput_InputEmptyHlcdDirectory_ThrowsArgumentException()
         {
             // Setup
@@ -140,23 +123,6 @@
         #region TargetProbabilityCalculationInput
 
         [Test]
-        public void CreateTargetProbabilityCalculationInput_InputEmptyName_ThrowsArgumentException()
-        {
-            // Setup
-            var mocks = new MockRepository();
-            var targetProbabilityCalculationInput = mocks.StrictMock<TargetProbabilityCalculationInput>(1, 2.2);
-
-            mocks.ReplayAll();
-
-            // Call
-            TestDelegate test = () => HydraRingActivityFactory.Create("", "hlcdDirectory", "ringId", HydraRingTimeIntegrationSchemeType.FBC, HydraRingUncertaintiesType.All, targetProbabilityCalculationInput, output => { });
-
-            // Assert
-            var exception = Assert.Throws<ArgumentException>(test, "Name should be set.");
-            Assert.AreEqual("name", exception.ParamName);
-        }
-
-        [Test]
         public void CreateTargetProbabilityCalculationInput_InputEmptyHlcdDirectory_ThrowsArgumentException()
         {
             // Setup
Index: Ringtoets/Piping/src/Ringtoets.Piping.Plugin/PipingGuiPlugin.cs
===================================================================
diff -u -r0a1752d24408af81508bc81d154293be23c9c4ea -r578037b5080f7a4820286ea02c6b4c322a8b1b09
--- Ringtoets/Piping/src/Ringtoets.Piping.Plugin/PipingGuiPlugin.cs	(.../PipingGuiPlugin.cs)	(revision 0a1752d24408af81508bc81d154293be23c9c4ea)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Plugin/PipingGuiPlugin.cs	(.../PipingGuiPlugin.cs)	(revision 578037b5080f7a4820286ea02c6b4c322a8b1b09)
@@ -409,7 +409,7 @@
                                                          (o, args) => { PipingCalculationService.Validate(calculation); });
 
             return builder.AddCustomItem(validateItem)
-                          .AddPerformCalculationItem(calculation, nodeData, PerformCalculation)
+                          .AddPerformCalculationItem(calculation, nodeData, PerformCalculation, context => true)
                           .AddClearCalculationOutputItem(calculation)
                           .AddSeparator()
                           .AddRenameItem()
Index: Ringtoets/Piping/test/Ringtoets.Piping.Forms.Test/TreeNodeInfos/PipingCalculationScenarioContextTreeNodeInfoTest.cs
===================================================================
diff -u -r9643d7e5bbb27a7782b5d939b029a70a1c023138 -r578037b5080f7a4820286ea02c6b4c322a8b1b09
--- Ringtoets/Piping/test/Ringtoets.Piping.Forms.Test/TreeNodeInfos/PipingCalculationScenarioContextTreeNodeInfoTest.cs	(.../PipingCalculationScenarioContextTreeNodeInfoTest.cs)	(revision 9643d7e5bbb27a7782b5d939b029a70a1c023138)
+++ Ringtoets/Piping/test/Ringtoets.Piping.Forms.Test/TreeNodeInfos/PipingCalculationScenarioContextTreeNodeInfoTest.cs	(.../PipingCalculationScenarioContextTreeNodeInfoTest.cs)	(revision 578037b5080f7a4820286ea02c6b4c322a8b1b09)
@@ -179,6 +179,7 @@
         [Test]
         public void ContextMenuStrip_PipingCalculationWithOutput_ContextMenuItemClearOutputEnabled()
         {
+            // Setup
             var gui = mocks.StrictMock<IGui>();
             var treeViewControlMock = mocks.StrictMock<TreeViewControl>();
             var calculation = new PipingCalculationScenario(new GeneralPipingInput(), new NormProbabilityPipingInput())
@@ -211,6 +212,36 @@
         }
 
         [Test]
+        public void ContextMenuStrip_Always_ContextMenuItemPerformCalculationEnabled()
+        {
+            // Setup
+            var gui = mocks.StrictMock<IGui>();
+            var treeViewControlMock = mocks.StrictMock<TreeViewControl>();
+            var calculation = new PipingCalculationScenario(new GeneralPipingInput(), new NormProbabilityPipingInput());
+            var pipingFailureMechanismMock = mocks.StrictMock<PipingFailureMechanism>();
+            var assessmentSectionMock = mocks.StrictMock<IAssessmentSection>();
+            var nodeData = new PipingCalculationScenarioContext(calculation,
+                                                        Enumerable.Empty<RingtoetsPipingSurfaceLine>(),
+                                                        Enumerable.Empty<StochasticSoilModel>(),
+                                                        pipingFailureMechanismMock,
+                                                        assessmentSectionMock);
+
+            gui.Expect(cmp => cmp.Get(nodeData, treeViewControlMock)).Return(new CustomItemsOnlyContextMenuBuilder());
+
+            mocks.ReplayAll();
+
+            plugin.Gui = gui;
+
+            // Call
+            var contextMenu = info.ContextMenuStrip(nodeData, null, treeViewControlMock);
+
+            // Assert
+            mocks.VerifyAll(); // Expect no calls on arguments
+
+            TestHelper.AssertContextMenuStripContainsItem(contextMenu, 1, RingtoetsCommonFormsResources.Calculate, RingtoetsCommonFormsResources.Calculate_ToolTip, RingtoetsCommonFormsResources.CalculateIcon);
+        }
+
+        [Test]
         public void ContextMenuStrip_Always_CallsContextMenuBuilderMethods()
         {
             // Setup