Index: Riskeer/ClosingStructures/src/Riskeer.ClosingStructures.Forms/Views/ClosingStructuresCalculationsView.cs
===================================================================
diff -u -r4e8d9d5f3b19a4bcd8c6d217e3d2b180d3171915 -r3a9bdc607d09f3c608af661cb261480eb52abe33
--- Riskeer/ClosingStructures/src/Riskeer.ClosingStructures.Forms/Views/ClosingStructuresCalculationsView.cs	(.../ClosingStructuresCalculationsView.cs)	(revision 4e8d9d5f3b19a4bcd8c6d217e3d2b180d3171915)
+++ Riskeer/ClosingStructures/src/Riskeer.ClosingStructures.Forms/Views/ClosingStructuresCalculationsView.cs	(.../ClosingStructuresCalculationsView.cs)	(revision 3a9bdc607d09f3c608af661cb261480eb52abe33)
@@ -71,7 +71,7 @@
 
         protected override void Dispose(bool disposing)
         {
-            if (disposing)
+            if (disposing && Loaded)
             {
                 foreshoreProfilesObserver.Dispose();
                 closingStructuresObserver.Dispose();
Index: Riskeer/Common/src/Riskeer.Common.Forms/Views/CalculationsView.cs
===================================================================
diff -u -r0dc048ac66c4b30debb032968fef2c485fe19397 -r3a9bdc607d09f3c608af661cb261480eb52abe33
--- Riskeer/Common/src/Riskeer.Common.Forms/Views/CalculationsView.cs	(.../CalculationsView.cs)	(revision 0dc048ac66c4b30debb032968fef2c485fe19397)
+++ Riskeer/Common/src/Riskeer.Common.Forms/Views/CalculationsView.cs	(.../CalculationsView.cs)	(revision 3a9bdc607d09f3c608af661cb261480eb52abe33)
@@ -88,8 +88,6 @@
             FailureMechanism = failureMechanism;
             AssessmentSection = assessmentSection;
 
-            InitializeObservers();
-
             InitializeComponent();
 
             InitializeListBox();
@@ -123,27 +121,41 @@
         /// </summary>
         protected IAssessmentSection AssessmentSection { get; }
 
+        /// <summary>
+        /// Gets an indicator whether the view is loaded.
+        /// </summary>
+        protected bool Loaded { get; private set; }
+
         protected override void OnLoad(EventArgs e)
         {
+            InitializeObservers();
+
             // Necessary to correctly load the content of the dropdown lists of the comboboxes...
             UpdateDataGridViewDataSource();
 
             base.OnLoad(e);
 
             UpdateGenerateCalculationsButtonState();
+
+            Loaded = true;
         }
 
         protected override void Dispose(bool disposing)
         {
             if (disposing)
             {
-                failureMechanismObserver.Dispose();
-                inputObserver.Dispose();
-                calculationObserver.Dispose();
-                calculationGroupObserver.Dispose();
-                hydraulicBoundaryLocationsObserver.Dispose();
+                if (Loaded)
+                {
+                    failureMechanismObserver.Dispose();
+                    inputObserver.Dispose();
+                    calculationObserver.Dispose();
+                    calculationGroupObserver.Dispose();
+                    hydraulicBoundaryLocationsObserver.Dispose();
+                }
 
                 components?.Dispose();
+
+                Loaded = false;
             }
 
             base.Dispose(disposing);
Index: Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Forms/Views/GrassCoverErosionInwardsCalculationsView.cs
===================================================================
diff -u -r4e8d9d5f3b19a4bcd8c6d217e3d2b180d3171915 -r3a9bdc607d09f3c608af661cb261480eb52abe33
--- Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Forms/Views/GrassCoverErosionInwardsCalculationsView.cs	(.../GrassCoverErosionInwardsCalculationsView.cs)	(revision 4e8d9d5f3b19a4bcd8c6d217e3d2b180d3171915)
+++ Riskeer/GrassCoverErosionInwards/src/Riskeer.GrassCoverErosionInwards.Forms/Views/GrassCoverErosionInwardsCalculationsView.cs	(.../GrassCoverErosionInwardsCalculationsView.cs)	(revision 3a9bdc607d09f3c608af661cb261480eb52abe33)
@@ -72,7 +72,7 @@
 
         protected override void Dispose(bool disposing)
         {
-            if (disposing)
+            if (disposing && Loaded)
             {
                 dikeProfilesObserver.Dispose();
             }
Index: Riskeer/HeightStructures/src/Riskeer.HeightStructures.Forms/Views/HeightStructuresCalculationsView.cs
===================================================================
diff -u -r4e8d9d5f3b19a4bcd8c6d217e3d2b180d3171915 -r3a9bdc607d09f3c608af661cb261480eb52abe33
--- Riskeer/HeightStructures/src/Riskeer.HeightStructures.Forms/Views/HeightStructuresCalculationsView.cs	(.../HeightStructuresCalculationsView.cs)	(revision 4e8d9d5f3b19a4bcd8c6d217e3d2b180d3171915)
+++ Riskeer/HeightStructures/src/Riskeer.HeightStructures.Forms/Views/HeightStructuresCalculationsView.cs	(.../HeightStructuresCalculationsView.cs)	(revision 3a9bdc607d09f3c608af661cb261480eb52abe33)
@@ -71,7 +71,7 @@
 
         protected override void Dispose(bool disposing)
         {
-            if (disposing)
+            if (disposing && Loaded)
             {
                 foreshoreProfilesObserver.Dispose();
                 heightStructuresObserver.Dispose();
Index: Riskeer/MacroStabilityInwards/src/Riskeer.MacroStabilityInwards.Forms/Views/MacroStabilityInwardsCalculationsView.cs
===================================================================
diff -u -r2ce9847b42ca47fc9008c8c18f9158a4b83e0fb3 -r3a9bdc607d09f3c608af661cb261480eb52abe33
--- Riskeer/MacroStabilityInwards/src/Riskeer.MacroStabilityInwards.Forms/Views/MacroStabilityInwardsCalculationsView.cs	(.../MacroStabilityInwardsCalculationsView.cs)	(revision 2ce9847b42ca47fc9008c8c18f9158a4b83e0fb3)
+++ Riskeer/MacroStabilityInwards/src/Riskeer.MacroStabilityInwards.Forms/Views/MacroStabilityInwardsCalculationsView.cs	(.../MacroStabilityInwardsCalculationsView.cs)	(revision 3a9bdc607d09f3c608af661cb261480eb52abe33)
@@ -69,7 +69,7 @@
 
         protected override void Dispose(bool disposing)
         {
-            if (disposing)
+            if (disposing && Loaded)
             {
                 surfaceLineObserver.Dispose();
                 stochasticSoilProfileObserver.Dispose();
Index: Riskeer/Piping/src/Riskeer.Piping.Forms/Views/PipingCalculationsView.cs
===================================================================
diff -u -r4e8d9d5f3b19a4bcd8c6d217e3d2b180d3171915 -r3a9bdc607d09f3c608af661cb261480eb52abe33
--- Riskeer/Piping/src/Riskeer.Piping.Forms/Views/PipingCalculationsView.cs	(.../PipingCalculationsView.cs)	(revision 4e8d9d5f3b19a4bcd8c6d217e3d2b180d3171915)
+++ Riskeer/Piping/src/Riskeer.Piping.Forms/Views/PipingCalculationsView.cs	(.../PipingCalculationsView.cs)	(revision 3a9bdc607d09f3c608af661cb261480eb52abe33)
@@ -73,7 +73,7 @@
 
         protected override void Dispose(bool disposing)
         {
-            if (disposing)
+            if (disposing && Loaded)
             {
                 surfaceLineObserver.Dispose();
                 stochasticSoilProfileObserver.Dispose();
Index: Riskeer/StabilityPointStructures/src/Riskeer.StabilityPointStructures.Forms/Views/StabilityPointStructuresCalculationsView.cs
===================================================================
diff -u -r4e8d9d5f3b19a4bcd8c6d217e3d2b180d3171915 -r3a9bdc607d09f3c608af661cb261480eb52abe33
--- Riskeer/StabilityPointStructures/src/Riskeer.StabilityPointStructures.Forms/Views/StabilityPointStructuresCalculationsView.cs	(.../StabilityPointStructuresCalculationsView.cs)	(revision 4e8d9d5f3b19a4bcd8c6d217e3d2b180d3171915)
+++ Riskeer/StabilityPointStructures/src/Riskeer.StabilityPointStructures.Forms/Views/StabilityPointStructuresCalculationsView.cs	(.../StabilityPointStructuresCalculationsView.cs)	(revision 3a9bdc607d09f3c608af661cb261480eb52abe33)
@@ -71,7 +71,7 @@
 
         protected override void Dispose(bool disposing)
         {
-            if (disposing)
+            if (disposing && Loaded)
             {
                 foreshoreProfilesObserver.Dispose();
                 stabilityPointStructuresObserver.Dispose();