Index: DamClients/DamUI/trunk/src/Dam/Tests/StiImporter/StiFileReaderTest.cs
===================================================================
diff -u -r3011 -r3017
--- DamClients/DamUI/trunk/src/Dam/Tests/StiImporter/StiFileReaderTest.cs	(.../StiFileReaderTest.cs)	(revision 3011)
+++ DamClients/DamUI/trunk/src/Dam/Tests/StiImporter/StiFileReaderTest.cs	(.../StiFileReaderTest.cs)	(revision 3017)
@@ -137,7 +137,7 @@
             var exception = Assert.Throws<StiFileReadException>(call);
             Exception innerException = exception.InnerException;
             Assert.That(innerException, Is.Not.Null);
-            Assert.That(exception.Message, Is.EqualTo($"Reading file failed: {innerException.Message}."));
+            Assert.That(exception.Message, Is.EqualTo($"Reading file '{filePath}' failed: {innerException.Message}."));
         }
 
         private static void AssertSoilLayerGeometry(GeometryPoint bottomLeftPoint,
Index: DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/Translations.xml
===================================================================
diff -u -r3016 -r3017
--- DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/Translations.xml	(.../Translations.xml)	(revision 3016)
+++ DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/Translations.xml	(.../Translations.xml)	(revision 3017)
@@ -579,4 +579,6 @@
   <Translation ID="OpenProjectWarningFileVersion" en-US="The project was created with an older version of DAM; the following parameters are not present anymore in Location and will be transferred to the location scenarios: Polder level, Head PL2, Head PL3 and Head PL4." nl-NL="Dit project is gemaakt met een oudere versie van DAM; de volgende parameters zijn niet meer aanwezig in Locatie en worden verplaatst naar de locatie scenarios: Polderpeil, Stijghoogte PL2, Stijghoogte PL3 and Stijghoogte PL4." />
   <Translation ID="ZoneTypeWarning" en-US="The parameter Zone type will be set to 'No Zones' if 'Zone Areas' was selected." nl-NL="De waarde voor Zone type wordt gezet naar 'Geen zones' als 'Zone gebieden' voorheen was geselecteerd." />
   <Translation ID="ImportSoilProfileError" en-US="'{0}' contains undefined soils." nl-NL="'{0}' bevat ongedefinieerde materialen." />
+  <Translation ID="ReadUnsupportedStiFile" en-US="'{0}' is an unsupported file." nl-NL="Bestand '{0}' wordt niet ondersteund." />
+  <Translation ID="ReadStiFileFailed" en-US="Reading file '{0}' failed: {1}." nl-NL="Het lezen van bestand '{0}' is mislukt: {1}." />
 </Translations>
\ No newline at end of file
Index: DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/StiImporter/StiFileReader.cs
===================================================================
diff -u -r3014 -r3017
--- DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/StiImporter/StiFileReader.cs	(.../StiFileReader.cs)	(revision 3014)
+++ DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/StiImporter/StiFileReader.cs	(.../StiFileReader.cs)	(revision 3017)
@@ -2,6 +2,7 @@
 using System.Linq;
 using Deltares.Geotechnics.IO.Importers;
 using Deltares.Geotechnics.Soils;
+using Deltares.Standard.Language;
 using Deltares.Standard.Logging;
 
 namespace Deltares.Dam.Data.StiImporter
@@ -29,7 +30,10 @@
                 {
                     LogManager.Add(new LogMessage(LogMessageType.Error, this, message));
                 }
-                throw new StiFileReadException($"'{filePath}' is an unsupported file.");
+
+                string errorMessageFormat = LocalizationManager.GetTranslatedText(this, "ReadUnsupportedStiFile");
+                string errorMessage = string.Format(errorMessageFormat, filePath);
+                throw new StiFileReadException(errorMessage);
             }
 
             try
@@ -39,7 +43,9 @@
             }
             catch (Exception e)
             {
-                throw new StiFileReadException($"Reading file failed: {e.Message}.", e);
+                string errorMessageFormat = LocalizationManager.GetTranslatedText(this, "ReadStiFileFailed");
+                string errorMessage = string.Format(errorMessageFormat, filePath, e.Message);
+                throw new StiFileReadException(errorMessage, e);
             }
         }
     }