Index: Ringtoets/Integration/src/Ringtoets.Integration.Plugin/AssessmentSectionMerger.cs
===================================================================
diff -u -r29d71fc2b326ae60c281103380b4babe1b881f87 -r03733ab29bedcd18c213b3d62b87080514a9a67b
--- Ringtoets/Integration/src/Ringtoets.Integration.Plugin/AssessmentSectionMerger.cs	(.../AssessmentSectionMerger.cs)	(revision 29d71fc2b326ae60c281103380b4babe1b881f87)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Plugin/AssessmentSectionMerger.cs	(.../AssessmentSectionMerger.cs)	(revision 03733ab29bedcd18c213b3d62b87080514a9a67b)
@@ -20,10 +20,12 @@
 // All rights reserved.
 
 using System;
+using System.Collections.Generic;
+using System.Linq;
 using Core.Common.Gui;
 using log4net;
 using Ringtoets.Integration.Data;
-using Ringtoets.Integration.Forms.Merge;
+using Ringtoets.Integration.Plugin.Properties;
 using Ringtoets.Integration.Service.Merge;
 using CoreCommonGuiResources = Core.Common.Gui.Properties.Resources;
 using RingtoetsStorageResources = Ringtoets.Storage.Core.Properties.Resources;
@@ -73,12 +75,28 @@
                 return;
             }
 
-            assessmentSectionProvider.GetAssessmentSections(filePath);
+            IEnumerable<AssessmentSection> assessmentSections = assessmentSectionProvider.GetAssessmentSections(filePath);
+
+            if (assessmentSections == null)
+            {
+                return;
+            }
+
+            if (!assessmentSections.Any())
+            {
+                LogError(Resources.AssessmentSectionMerger_No_matching_AssessmentSections);
+                return;
+            }
         }
 
         private static void CancelMergeAndLog()
         {
             log.Info(CoreCommonGuiResources.GuiImportHandler_ImportItemsUsingDialog_Importing_cancelled);
         }
+
+        private static void LogError(string message)
+        {
+            log.Error(message);
+        }
     }
 }
\ No newline at end of file
Index: Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Properties/Resources.Designer.cs
===================================================================
diff -u -re25695acf2407be4ea1a9ea6c1791aba5c0ca81f -r03733ab29bedcd18c213b3d62b87080514a9a67b
--- Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Properties/Resources.Designer.cs	(.../Resources.Designer.cs)	(revision e25695acf2407be4ea1a9ea6c1791aba5c0ca81f)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Properties/Resources.Designer.cs	(.../Resources.Designer.cs)	(revision 03733ab29bedcd18c213b3d62b87080514a9a67b)
@@ -142,6 +142,15 @@
         }
         
         /// <summary>
+        ///   Looks up a localized string similar to Er zijn geen trajecten gevonden die samengevoegd kunnen worden..
+        /// </summary>
+        public static string AssessmentSectionMerger_No_matching_AssessmentSections {
+            get {
+                return ResourceManager.GetString("AssessmentSectionMerger_No_matching_AssessmentSections", resourceCulture);
+            }
+        }
+        
+        /// <summary>
         ///   Looks up a localized string similar to &amp;Selecteren....
         /// </summary>
         public static string BackgroundData_SelectMapData {
Index: Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Properties/Resources.resx
===================================================================
diff -u -re25695acf2407be4ea1a9ea6c1791aba5c0ca81f -r03733ab29bedcd18c213b3d62b87080514a9a67b
--- Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Properties/Resources.resx	(.../Resources.resx)	(revision e25695acf2407be4ea1a9ea6c1791aba5c0ca81f)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Properties/Resources.resx	(.../Resources.resx)	(revision 03733ab29bedcd18c213b3d62b87080514a9a67b)
@@ -185,4 +185,7 @@
   <data name="AssemblyResultTotal_DisplayName" xml:space="preserve">
     <value>Gecombineerd totaaloordeel</value>
   </data>
+  <data name="AssessmentSectionMerger_No_matching_AssessmentSections" xml:space="preserve">
+    <value>Er zijn geen trajecten gevonden die samengevoegd kunnen worden.</value>
+  </data>
 </root>
\ No newline at end of file
Index: Ringtoets/Integration/test/Ringtoets.Integration.Plugin.Test/AssessmentSectionMergerTest.cs
===================================================================
diff -u -rcdb8bb817e1731b97aa9f4198b51f6ab88e76c8d -r03733ab29bedcd18c213b3d62b87080514a9a67b
--- Ringtoets/Integration/test/Ringtoets.Integration.Plugin.Test/AssessmentSectionMergerTest.cs	(.../AssessmentSectionMergerTest.cs)	(revision cdb8bb817e1731b97aa9f4198b51f6ab88e76c8d)
+++ Ringtoets/Integration/test/Ringtoets.Integration.Plugin.Test/AssessmentSectionMergerTest.cs	(.../AssessmentSectionMergerTest.cs)	(revision 03733ab29bedcd18c213b3d62b87080514a9a67b)
@@ -20,10 +20,12 @@
 // All rights reserved.
 
 using System;
+using System.Linq;
 using Core.Common.Gui;
 using Core.Common.TestUtil;
 using NUnit.Framework;
 using Rhino.Mocks;
+using Ringtoets.Integration.Data;
 using Ringtoets.Integration.Service.Merge;
 
 namespace Ringtoets.Integration.Plugin.Test
@@ -69,7 +71,7 @@
         }
 
         [Test]
-        public void StartMerge_FilePathNotNull_Continue()
+        public void GivenValidFilePath_WhenAssessmentSectionProviderReturnNull_Abort()
         {
             // Setup
             var mocks = new MockRepository();
@@ -88,5 +90,26 @@
             TestHelper.AssertLogMessagesCount(call, 0);
             mocks.VerifyAll();
         }
+
+        [Test]
+        public void GivenValidFilePath_WhenAssessmentSectionProviderReturnEmptyCollection_LogErrorAndAbort()
+        {
+            // Setup
+            var mocks = new MockRepository();
+            var inquiryHelper = mocks.StrictMock<IInquiryHelper>();
+            inquiryHelper.Expect(helper => helper.GetSourceFileLocation(null)).IgnoreArguments().Return(string.Empty);
+            var assessmentSectionProvider = mocks.StrictMock<IAssessmentSectionProvider>();
+            assessmentSectionProvider.Expect(asp => asp.GetAssessmentSections(null)).IgnoreArguments().Return(Enumerable.Empty<AssessmentSection>());
+            mocks.ReplayAll();
+
+            var merger = new AssessmentSectionMerger(inquiryHelper, assessmentSectionProvider);
+
+            // Call
+            Action call = () => merger.StartMerge();
+
+            // Assert
+            TestHelper.AssertLogMessageWithLevelIsGenerated(call, new Tuple<string, LogLevelConstant>("Er zijn geen trajecten gevonden die samengevoegd kunnen worden.", LogLevelConstant.Error), 1);
+            mocks.VerifyAll();
+        }
     }
 }
\ No newline at end of file