Index: Core/Common/src/Core.Common.Controls.TreeView/TreeViewControl.cs
===================================================================
diff -u -rc07c8243b6c74fa79a77f2edbc1799375064b057 -r9c811f0b982e9e29dc0652dfad928ff08ae75a3d
--- Core/Common/src/Core.Common.Controls.TreeView/TreeViewControl.cs	(.../TreeViewControl.cs)	(revision c07c8243b6c74fa79a77f2edbc1799375064b057)
+++ Core/Common/src/Core.Common.Controls.TreeView/TreeViewControl.cs	(.../TreeViewControl.cs)	(revision 9c811f0b982e9e29dc0652dfad928ff08ae75a3d)
@@ -186,6 +186,13 @@
             treeView.SelectedNode = GetNodeByTag(dataObject);
         }
 
+        public string GetPathForData(object dataObject)
+        {
+            var node = GetNodeByTag(dataObject);
+
+            return node != null ? node.FullPath : "";
+        }
+
         /// <summary>
         /// This method searches all nodes in the tree view for a node with a matching tag.
         /// </summary>
Index: Core/Common/src/Core.Common.Gui/RingtoetsGui.cs
===================================================================
diff -u -rc07c8243b6c74fa79a77f2edbc1799375064b057 -r9c811f0b982e9e29dc0652dfad928ff08ae75a3d
--- Core/Common/src/Core.Common.Gui/RingtoetsGui.cs	(.../RingtoetsGui.cs)	(revision c07c8243b6c74fa79a77f2edbc1799375064b057)
+++ Core/Common/src/Core.Common.Gui/RingtoetsGui.cs	(.../RingtoetsGui.cs)	(revision 9c811f0b982e9e29dc0652dfad928ff08ae75a3d)
@@ -393,11 +393,7 @@
                 return;
             }
 
-            var node = ProjectExplorer.TreeViewControl.GetNodeByTag(view.Data);
-            if (node != null)
-            {
-                DocumentViews.SetTooltip(view, node.FullPath);
-            }
+            DocumentViews.SetTooltip(view, ProjectExplorer.TreeViewControl.GetPathForData(view.Data));
         }
 
         private void ConfigureLogging()