Index: Ringtoets/Common/src/Ringtoets.Common.Service/HydraulicBoundaryDatabaseConnectionValidator.cs
===================================================================
diff -u -rf8c28b3b04cdabb62ea37772efcb1f4ebbbf2b9e -r9cf89e3f60d17b61c5ef1ba1c4c7e18ca0c9b2f4
--- Ringtoets/Common/src/Ringtoets.Common.Service/HydraulicBoundaryDatabaseConnectionValidator.cs	(.../HydraulicBoundaryDatabaseConnectionValidator.cs)	(revision f8c28b3b04cdabb62ea37772efcb1f4ebbbf2b9e)
+++ Ringtoets/Common/src/Ringtoets.Common.Service/HydraulicBoundaryDatabaseConnectionValidator.cs	(.../HydraulicBoundaryDatabaseConnectionValidator.cs)	(revision 9cf89e3f60d17b61c5ef1ba1c4c7e18ca0c9b2f4)
@@ -42,7 +42,8 @@
                 return Resources.HydraulicBoundaryDatabaseConnectionValidator_No_hydraulic_boundary_database_imported;
             }
 
-            string validationProblem = HydraulicBoundaryDatabaseHelper.ValidatePathForCalculation(database.FilePath);
+            string validationProblem = HydraulicBoundaryDatabaseHelper.ValidatePathForCalculation(database.FilePath,
+                                                                                                  database.EffectivePreprocessorDirectory());
             if (!string.IsNullOrEmpty(validationProblem))
             {
                 return string.Format(Resources.Hydraulic_boundary_database_connection_failed_0_,