Index: src/Plugins/Wti/Wti.Forms/NodePresenters/PipingOutputNodePresenter.cs
===================================================================
diff -u -r49b7320ad56bfa60788e8792b79dd537318f68ff -rbbc44cc497cf85875585c8aad671c49b6de4fbc3
--- src/Plugins/Wti/Wti.Forms/NodePresenters/PipingOutputNodePresenter.cs	(.../PipingOutputNodePresenter.cs)	(revision 49b7320ad56bfa60788e8792b79dd537318f68ff)
+++ src/Plugins/Wti/Wti.Forms/NodePresenters/PipingOutputNodePresenter.cs	(.../PipingOutputNodePresenter.cs)	(revision bbc44cc497cf85875585c8aad671c49b6de4fbc3)
@@ -41,7 +41,10 @@
             return false;
         }
 
-        public void OnNodeRenamed(object nodeData, string newName) {}
+        public void OnNodeRenamed(object nodeData, string newName)
+        {
+            throw new InvalidOperationException(string.Format("Cannot rename tree node of type {0}.", GetType().Name));
+        }
 
         public void OnNodeChecked(ITreeNode node) {}
 
@@ -80,7 +83,7 @@
 
         public bool RemoveNodeData(object parentNodeData, object nodeData)
         {
-            return false;
+            throw new InvalidOperationException(String.Format("Cannot delete node of type {0}.", GetType().Name));
         }
     }
 }
\ No newline at end of file
Index: test/Plugins/Wti/Wti.Forms.Test/NodePresenters/PipingOutputNodePresenterTest.cs
===================================================================
diff -u -r49b7320ad56bfa60788e8792b79dd537318f68ff -rbbc44cc497cf85875585c8aad671c49b6de4fbc3
--- test/Plugins/Wti/Wti.Forms.Test/NodePresenters/PipingOutputNodePresenterTest.cs	(.../PipingOutputNodePresenterTest.cs)	(revision 49b7320ad56bfa60788e8792b79dd537318f68ff)
+++ test/Plugins/Wti/Wti.Forms.Test/NodePresenters/PipingOutputNodePresenterTest.cs	(.../PipingOutputNodePresenterTest.cs)	(revision bbc44cc497cf85875585c8aad671c49b6de4fbc3)
@@ -1,4 +1,5 @@
-using System.ComponentModel;
+using System;
+using System.ComponentModel;
 using DelftTools.Controls;
 using DelftTools.Shell.Core;
 using DelftTools.Utils.Collections;
@@ -107,6 +108,26 @@
         }
 
         [Test]
+        public void OnNodeRenamed_Always_ThrowInvalidOperationException()
+        {
+            // Setup
+            var mocks = new MockRepository();
+            var nodeMock = mocks.StrictMock<ITreeNode>();
+            mocks.ReplayAll();
+
+            var nodePresenter = new PipingSurfaceLineCollectionNodePresenter();
+
+            // Call
+            TestDelegate call = () => { nodePresenter.OnNodeRenamed(nodeMock, "<Insert New Name Here>"); };
+
+            // Assert
+            var exception = Assert.Throws<InvalidOperationException>(call);
+            var expectedMessage = string.Format("Cannot rename tree node of type {0}.", nodePresenter.GetType().Name);
+            Assert.AreEqual(expectedMessage, exception.Message);
+            mocks.ReplayAll(); // Expect no calls on tree node
+        }
+
+        [Test]
         public void OnNodeChecked_Always_DoNothing()
         {
             // Setup
@@ -293,16 +314,18 @@
         }
 
         [Test]
-        public void RemoveNodeData_Always_ReturnFalse()
+        public void RemoveNodeData_Always_ThrowsInvalidOperationException()
         {
             // Setup
             var nodePresenter = new PipingOutputNodePresenter();
 
             // Call
-            bool removalSuccesful = nodePresenter.RemoveNodeData(null, null);
+            TestDelegate removeAction = () => nodePresenter.RemoveNodeData(null, null);
 
             // Assert
-            Assert.IsFalse(removalSuccesful);
+            var exception = Assert.Throws<InvalidOperationException>(removeAction);
+            var expectedMessage = string.Format("Cannot delete node of type {0}.", nodePresenter.GetType().Name);
+            Assert.AreEqual(expectedMessage, exception.Message);
         }
     }
 }
\ No newline at end of file